Sez

“There is nothing in this world, I venture to say, that would so effectively help one to survive even the worst conditions as the knowledge that there is meaning in one's life.”
― Viktor E. Frankl, Man's Search for Meaning

“Praise and blame, gain and loss, pleasure and sorrow come and go like the wind. To be happy, rest like a giant tree in the midst of them all”
― Buddha

“For goodness sake,' they'll cry, 'you cannot argue against it--two times two is four! Nature doesn't consult you; it doesn't give a damn for your wishes or whether its laws please or do not please you. You must accept it as it is, and hence accept all consequences. A wall is indeed a wall. ...' And so on and so forth. Good God, what do I care about the laws of nature and arithmetic if, for one reason or another, I don't like these laws, including the 'two times two is four'? Of course, I cannot break through this wall with my head if I don't have the strength to break through it, but neither will I accept it simply because I face a stone wall and am not strong enough.”
― Fyodor Dostoevsky, Notes From The Underground

“But there is also purpose in that life which is almost barren of both creation and enjoyment and which admits of but one possibility of high moral behavior: namely, in man's attitude to his existence, an existence restricted by external forces.”
― Viktor E. Frankl, Man's Search for Meaning