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

The future comes like an unwelcome guest.

Often the prudent, far from making their destinies, succumb to them; it is destiny which makes them prudent.

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

I like the dreams of the future better than the history of the past.

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.

The world is dying of machinery; that is the great disease, that is the plague that will sweep away and destroy civilization; man will have to rise against it sooner or later.

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

It would be madness, and inconsistency, to suppose that things which have never yet been performed can be performed without employing some hitherto untried means.

The future, like everything else, is no longer quite what it used to be.

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

People will not look forward to posterity who never look backward to their ancestors.