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.

All progress is based upon a universal, innate desire on the part of every organism to live beyond its income.

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

My interest is in the future, because I am going to spend the rest of my life there.

The future is no more uncertain than the present.

We must confess that at present the rich predominate, but the future will be for the virtuous and ingenious.

Time will reveal everything. It is a babbler and speaks even when not asked.

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

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.

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.

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

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