Sartre who wrote about existentialism had a deep enough understanding of fallout to be perpetually in it himself.   
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Sartre quote

"This is what I thought: for the most banal even to become an adventure, you must (and this is enough) begin to recount it. This is what fools people: a man is always a teller of tales, he sees everything that happens to him through them; and he tries to live his own life as if he were telling a story. But you have to choose: live or tell."
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Macgregor, Charlotte on Sartre

"A Sartre-Minkowski approach would show clients that when they relax a fixed idea of who they are and how they might be, they begin to liberate themselves from their own individual suppression. An important theme of such an approach would focus on the balance between holding enough of an idea of self to project into the future through personal impetus, whilst maintaining fluidity and openness in order to hold off stagnation. Considering the socio-cultural element of how potential is thwarted or expanded is important in helping clients evaluate the choices that they have, and the extent to which they are free to take responsibility. Facilitating imaginative investigation of what sort of future a client might wish for might play an important part in loosening present experiences of stagnation and disconnection. Exploring what it is like to live with uncertainty and anxiety, and acknowledging these experiences as fundamental givens of existence, helps clients to face more openly how they might be holding onto more static ideas in order to alleviate anxiety, and how holding onto these ideas might be part of maintaining stagnation. Through these sorts of explorations we begin to help clients challenge the sedimentations and mineralisations that, from a Sartrean perspective, might be serving to maintain depressive experience (Sartre, 1960). To enable clients to face how they construct meaning and explore their own sedimentations, it is necessary to openly and critically question those sedimentations that are culturally constructed, such as notions of fixed self or personality, and the sedimentation of distress into psychopathology. For Sartre, the crux of helping somebody experiencing depression would be to focus on discovering a subjective choice by which each living person makes himself a person' (Sartre, 1943: p599).

The combined ideas of Sartre and Minkowski would suggest a therapeutic approach focussed on exploring the responsibility we each have to choose what we make of ourselves and how we live at a particular time; the associated implications and limitations of freedom and choice on a wider social level; and the temporal thread of our existence and how we connect to, and make meaning from, our pasts, presents and futures. While we might extrapolate and approximate what particular experiences of depression might mean and how they might be constructed according to Sartre and Minkowski, ultimately any understanding and exploration can only ever be of an individuals unique experience of being in the world at a particular moment in time."
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A Sartre love letter to Simone de Beauvoir

"My dear little girl

For a long time I’ve been wanting to write to you in the evening after one of those outings with friends that I will soon be describing in “A Defeat,” the kind when the world is ours. I wanted to bring you my conqueror’s joy and lay it at your feet, as they did in the Age of the Sun King. And then, tired out by all the shouting, I always simply went to bed. Today I’m doing it to feel the pleasure you don’t yet know, of turning abruptly from friendship to love, from strength to tenderness. Tonight I love you in a way that you have not known in me: I am neither worn down by travels nor wrapped up in the desire for your presence. I am mastering my love for you and turning it inwards as a constituent element of myself. This happens much more often than I admit to you, but seldom when I’m writing to you. Try to understand me: I love you while paying attention to external things. At Toulouse I simply loved you. Tonight I love you on a spring evening. I love you with the window open. You are mine, and things are mine, and my love alters the things around me and the things around me alter my love. I love you with all my heart and soul."
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Sartre's relationship with Simone was an open one and this was a letter she sent to one of her lovers who deserted her.
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Simone's letter to Nelson Algren

"I am better at dry sadness than at cold anger, for I remained dry eyed until now, as dry as smoked fish, but my heart is a kind of dirty soft custard inside.

I am not sad. Rather stunned, very far away fro myself, not really believing you are now so far, so far, you so near. I want to tell you only two things before leaving, and then I’ll not speak about it any more, I promise. First, I hope so much, I want and need so much to see you again, some day. But, remember, please, I shall never more ask to see you — not from any pride since I have none with you, as you know, but our meeting will mean something only when you wish it. So, I’ll wait. When you’ll wish it, just tell. I shall not assume that you love me anew, not even that you have to sleep with me, and we have not to stay together such a long time — just as you feel, and when you feel. But know that i’ll always long for your asking me. No, I cannot think that I shall not see you again. I have lost your love and it was (it is) painful, but shall not lose you. Anyhow, you have me so much, Nelson, what you gave me meant so much, that you could never take it back. And then your tenderness and friendship were so precious to me that I can still feel warm and happy and harshly grateful when I look at you inside me. I do hope this tenderness and friendship will never, never desert me. As for me, it is baffling to say so and I feel ashamed, but it is the only true truth: I just love as much as I did when I landed into your disappointed arms, that means with my whole self and all my dirty heart; I cannot do less. But that will not bother you, honey, and don’t make writing letters of any kind a duty, just write when you feel like it, knowing every time it will make me very happy.

Well, all words seem silly. You seem so near, so near, let me come near to you, too. And let me, as in the past times, let me be in my own heart forever. Your own Simone
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Burton on Sartre

For Sartre, people may pretend to themselves that they do not have the freedom to make choices, but they cannot pretend to themselves that they are not themselves, that is, conscious human beings who actually have little or nothing to do with their pragmatic concerns, social roles, and value systems. In pursuing such and such pragmatic concerns or adopting such and such social roles and value systems, a person may pretend to himself that he does not have the freedom to make choices, but to do so is in itself to make a choice, namely, the choice of pretending to himself that he does not have the freedom to make choices. Man, Sartre concludes, is condemned to be free.
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Ratcliffe on Sartre

Depression, I suggest, can involve what we might call a diminished experience of free will. Although it is often assumed that we have such an experience, it is far from clear what it consists of. I argue that this lack of clarity is symptomatic of looking in the wrong place. Drawing on themes in Sartre's Being and Nothingness, I propose that the sense of freedom associated with action is not  first and foremost an episodic, quale or feeling that is experienced as internal to the agent. Rather, it is embedded in the experienced world; my freedom appears in the guise of my surroundings. This makes better sense of what people with depression consistently describe: a diminished ability to act that is inextricable from a transformation of the experienced world. As well as illuminating an aspect of the experience of depression.
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Hopefully there could be a few ideas in the above