The reading of all good books is like a conversation with the finest minds of past centuries.

Sometimes it is the people who no one imagines anything of who do the things that no one can imagine.

Learn to be silent. Let your quiet mind listen and absorb.

Kind words do not cost much. Yet they accomplish much.

Divide each difficulty into as many parts as is feasible and necessary to resolve it.

Live your life as an Exclamation rather than an Explanation

 image quote by Rene Descartes

Conquer yourself rather than the world.

It is not enough to have a good mind; the main thing is to use it well.

To know what people really think, pay regard to what they do, rather than what they say.

I have discovered that all human evil comes from this, man's being unable to sit still and quiet in a room alone.

Concern should drive us into action and not into a depression. No man is free who cannot control himself.

It is through science that we prove, but through intuition that we discover.

We must learn our limits. We are all something but none of us are everything.

 image quote by Isaac Newton

We build too many walls and not enough bridges.

Strength of mind rests in sobriety; for this keeps your reason unclouded by passion.

I maintain that, if everyone knew what others said about him, there would not be four friends in the world.

True courage is not the brutal force of vulgar heroes, but the firm resolve of virtue and reason.

Whenever anyone has offended me, I try to raise my soul so high that the offense cannot reach it.

People are usually more convinced by reasons they discovered themselves than by those found out by others.

Except our own thoughts, there is nothing absolutely in our power.

 image quote by Rene Descartes

I think; therefore I am.

Two things control men's nature, instinct and experience.

Man's greatness lies in his power of thought.

If you would be a real seeker after truth, it is necessary that at least once in your life you doubt, as far as possible, all things.

In faith there is enough light for those who want to believe and enough shadows to blind those who don't.

Jesus is the God whom we can approach without pride and before whom we can humble ourselves without despair.

Each problem that I solved became a rule, which served afterwards to solve other problems.

 image quote by Pythagoras

Be silent or let the words be worth more than silence.

Rest satisfied with doing well, and leave others to talk of you as they will.

To doubt everything, or, to believe everything, are two equally convenient solutions; both dispense with the necessity of reflection.

Nothing is more fairly distributed than common sense: no one thinks he needs more of it than he already has.

Evil is easy, and has infinite forms.

Mathematicians do not study objects, but relations between objects.

Cogito ergo sum. (I think, therefore I am.)

 image quote by Isaac Newton

Tact is the art of making a point without making an enemy.

Mathematics is a game played according to certain simple rules with meaningless marks on paper.

"Obvious" is the most dangerous word in mathematics.

There is a good principle which created order, light, and man, and an evil principle which created chaos, darkness, and woman.

Do you wish people to think well of you? Don't speak well of yourself.

Silence is better than unmeaning words.

As long as man continues to be the ruthless destroyer of lower living beings he will never know health or peace. For as long as men massacre animals, they will kill each other.

 image quote by Blaise Pascal

All of our reasoning ends in surrender to feeling.

The deepest definition of youth is life as yet untouched by tragedy.

It is not good to be too free. It is not good to have everything one wants.

Men never do evil so fully and cheerfully as when we do it out of conscience.

The oldest, shortest words - "yes" and "no" - are those which require the most thought.

When writing about transcendental issues, be transcendentally clear.

Everything is self-evident.

 image quote by Blaise Pascal

Kind words do not cost much. Yet they accomplish much.

If I am anything, which I highly doubt, I have made myself so by hard work.

Seek simplicity but distrust it.

The struggle alone pleases us, not the victory.

The war existing between the senses and reason.

I think; therefore I am.

Habit is the second nature which destroys the first.

 image quote by Isaac Newton

Tact is the art of making a point without making an enemy.

Beauty is a harmonious relation between something in our nature and the quality of the object which delights us.

Smiling always with a never fading serenity of countenance, and flourishing in an immortal youth.