Solón quote: “Call no man happy until he is dead.”

“Call no day happy 'til it is done; call no man happy til he is dead.”

Aleksandr Solzhenitsyn book The Oak and the Calf

Solzhenitsyn here seems to be paraphrasing Sophocles who expresses similar ideas in Oedipus Rex. This is also a direct reference to Plutarch's line, "call no man fortunate until he is dead," from his "Parallel Lives".
The Oak and the Calf (1975)

“An unlucky rich man is more capable of satisfying his desires and of riding out disaster when it strikes, but a lucky man is better off than him…He is the one who deserves to be described as happy. But until he is dead, you had better refrain from calling him happy, and just call him fortunate.”

Solón (-638–-558 BC) Athenian legislator

Herodotus (trans. Robin Waterfield) The Histories Bk. 1, ch. 32, pp. 15-16.

“Call no man happy till he dies.”

Herodotus (-484–-425 BC) ancient Greek historian, often considered as the first historian

Herodotus actually attributes this to Solon in a conversation with King Crœsus.
Variants:
Deem no man happy, until he passes the end of his life without suffering grief
Many very wealthy men are not happy, while many who have but a moderate living are fortunate; and in truth the very rich man who is not happy has two advantages only as compared with the poor man who is fortunate, whereas this latter has many as compared with the rich man who is not happy. The rich man is able better to fulfil his desire, and also to endure a great calamity if it fall upon him; whereas the other has advantage over him in these things which follow: — he is not indeed able equally with the rich man to endure a calamity or to fulfil his desire, but these his good fortune keeps away from him, while he is sound of limb, free from disease, untouched by suffering, the father of fair children and himself of comely form; and if in addition to this he shall end his life well, he is worthy to be called that which thou seekest, namely a happy man; but before he comes to his end it is well to hold back and not to call him yet happy but only fortunate. Now to possess all these things together is impossible for one who is mere man, just as no single land suffices to supply all things for itself, but one thing it has and another it lacks, and the land that has the greatest number of things is the best: so also in the case of a man, no single person is complete in himself, for one thing he has and another he lacks; but whosoever of men continues to the end in possession of the greatest number of these things and then has a gracious ending of his life, he is by me accounted worthy, O king, to receive this name.
The History of Herodotus Book I, Chapter 32 http://www.sacred-texts.com/cla/hh/hh1030.htm.
Misattributed

“Let no man be called happy before his death. Till then, he is not happy, only lucky.”

Solón (-638–-558 BC) Athenian legislator

“Your job is to struggle until you drop dead. That's it. Stop trying to be happy. The day you stop trying to be happy you might have a chance to live.”

Michael Savage book The Savage Nation

The Savage Nation, The Savage Nation (1995- ), 2011(?) (Audio: Michael Savage – Suicide Is Never An Option https://www.youtube.com/watch?v=9oIjOjPW2OM&feature=youtu.be&t=1m29s)
2011
Context: Just remember, it's not heroic to kill yourself, and it's a violation of God's Laws.... The way it was explained to me in my tradition is... you are not your own property. You are God's property.... You have no right to commit suicide, don't even think– it's not an option. See, like in America, everything is "choice". "It's your choice." It's NOT your choice. You have no choice, so don't even think about it. It's not your choice to make. Soon enough, God will come for you, okay? Leave it at that. And every time you have a suicidal ideation, just push it away, it's not you. It's the devil trying to put something inside your head. We live in such a sick society, that the demented people who run the mind games on our heads like you to believe that it's your choice whether to commit suicide or not. It's NOT your choice. It's immoral, and that's the end of it. You don't have to ponder everything like it's a choice. You have children, that's all you need to know. What would the world be like for them if you committed suicide, do you have any idea? What you've gotta do is just get back on the road and keep walking, and don't stare at the chasm. That's all. You stand on the edge of a road, look down at the chasm and you'll get dizzy and fall in. So stop staring at the chasm. Get back on the road, and go back down to the meadow, and be with your family. And go on continue the struggle. That's all there is to it. That's your job. Your job is to struggle until you drop dead. That's it. Stop trying to be happy. The day you stop trying to be happy you might have a chance to live.

“I didn't know Elvis was alive until he was dead.”

Elaine Dundy (1921–2008) American journalist, actress

As quoted in "Interview: Elaine Dundy, celebrated author of the seminal book, Elvis & Gladys: Genesis of The King, talks to EIN" (2004) http://www.elvisinfonet.com/dundy1.html
Context: I didn't know Elvis was alive until he was dead. But how many stories are like mine? Until his death August 16, 1977, it was possible to get through a day without hearing his name. Of course I remember all the early outrage he caused but believe me it was easy not to see any of his films. It doesn't mean that music has not always dominated my heart and mind. During the years barren of Elvis I did have my record player on constantly but it was playing folk, blues, and jazz. It was playing Al Jolson, Maurice Chevalier, Billie Holiday, Ethel Merman, and Noel Coward. The human voice raised in song has always been important to me so I include Miles Davis whose trumpet is such an important human voice. Then after his death in London in taxis, on radio and TV I heard nothing but Elvis records and that grabbed my attention.