Albert Einstein

I think that only daring speculation can lead us further and not accumulation of facts.

Science can only ascertain what is, but not what should be, and outside of its domain value judgments of all kinds remain necessary. ?

Blind belief in authority is the greatest enemy of truth.

Reality is merely an illusion, albeit a very persistent one.

The only real valuable thing is intuition.

Laws alone cannot secure freedom of expression; in order that every man may present his views without penalty there must be a spirit of tolerance in the entire population.

One thing I have learned in a long life: that all our science, measured against reality, is primitive and childlike - and yet it is the most precious thing we have.

Common sense is the collection of prejudices acquired by age eighteen.

Do not worry about your difficulties in Mathematics. I can assure you mine are still greater.

The important thing is not to stop questioning. Curiosity has its own reason for existing.

You cannot simultaneously prevent and prepare for war.

Solitude [...] is painful in youth, but delicious in the years of maturity.

Out of clutter, find simplicity.

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

I speak to everyone in the same way, whether he is the garbage man or the president of the university.