In order to seek truth, it is necessary once in the course of our life to doubt, as far as possible, of all things.

Three things have been difficult to tame: the oceans, fools, and women. We may soon be able to tame the oceans; fools and women will take a little longer.

Everything existing in the universe is the fruit of chance and necessity.

Every day brings a chance to live free of regret and with as much joy, fun, and laughter as you can stand.

Life swings like a pendulum backward and forward between pain and boredom.

Wrinkles are engraved smiles.

Your children are not your children. They are the sons and daughters of Life's longing for itself.

The time you enjoy wasting is not wasted time.

As soon as you trust yourself, you will know how to live.

Nothing in life is more remarkable than the unnecessary anxiety which we endure, and generally create ourselves.

First, then, God, being all-just, wishes to do justice; being all-wise, knows what justice is; being all-powerful, can do justice. Why then injustice?

Freedom would be not to choose between black and white but to abjure such prescribed choices.

Courage is a kind of salvation.

Being ignorant is not so much a shame, as being unwilling to learn.

I never think of the future - it comes soon enough.

Life always waits for some crisis to occur before revealing itself at its most brilliant.

Life is what happens to you while you're busy making other plans.

Each man should frame life so that at some future hour fact and his dreaming meet.

Every life has a measure of sorrow, and sometimes this is what awakens us.

Doubt must be no more than vigilance, otherwise it can become dangerous.

Science is the most reliable guide for civilization, for life, for success in the world. Searching a guide other than the science is meaning carelessness, ignorance and heresy.