The most powerful force in the universe is compound interest.
Imagination is more important than knowledge. For knowledge is limited, whereas imagination embraces the entire world, stimulating progress, giving birth to evolution.
I believe in Spinoza's God, Who reveals Himself in the lawful harmony of the world, not in a God Who concerns Himself with the fate and the doings of mankind.
Subtle is the Lord, but malicious He is not.
A hundred times every day I remind myself that my inner and outer life are based on the labors of other men, living and dead, and that I must exert myself in order to give in the same measure as I have received and am still receiving...
The difference between genius and stupidity is that genius has its limits.
If I had to live my life over again, I would live it as a trader of goods.
Science without religion is lame, religion without science is blind.
Science is a wonderful thing if one does not have to earn one's living at it.
Generations to come will scarcely believe that such a one as this walked the earth in flesh and blood.