Do not boast about tomorrow, for you do not know what a day may bring.

I don’t try to describe the future. I try to prevent it.

Every man takes the limits of his own vision for the limits of the world.

Not a change for the better in our human housekeeping has ever taken place that wise and good men have not opposed it—have not prophesied that the world would wake up to find its throat cut in consequence.

Tomorrow never comes, man. It’s all the same fucking day.

The less a man knows about the past and the present, the more insecure must prove to be his judgment of the future.

Men are able to assist fortune but not to thwart her. They can weave her designs, but they cannot destroy them.

The world began without man, and it will end without him.

As natural selection works solely by and for the good of each being, all corporeal and mental endowments will tend to progress toward perfection.

A change of fortune hurts a wise man no more than a change of the moon.

Destiny is not a matter of chance, it is a matter of choice; it is not a thing to be waited for, it is a thing to be achieved.

Every saint has a past, and every sinner has a future.

I’ve seen the future, brother; it is murder.