Though confined to our destiny, we do get to pick the color scheme.
I regret less the road not taken than my all-fired hurry along the road I took.
A watched child never learns.
Eventually you realize that your whole life up to now has been preparation, and you begin to suspect that the rest might be preparation, too.
Life never tires of testing the proposition that life must go on.
Someday a computer will give a wrong answer to spare someone's feelings, and man will have invented artificial intelligence.