When you don’t know what you’re living for, you don’t care how you live from one day to the next. You’re happy the day has passed and the night has come, and in your sleep you bury the tedious question of what you lived for that day and what you’re going to live for tomorrow.

Oblomov, Ivan Goncharov

I can never drive my car over a bridge without thinking of suicide.
I can never look at a lake or an ocean without thinking of suicide.

Charles Bukowski, The Captain is Out to Lunch and the Sailors Have Taken Over the Ship