Knowledge exists in two forms - lifeless, stored in books, and alive, in the consciousness of men. The second form of existence is after all the essential one; the first, indispensable as it may be, occupies only an inferior position.

There is no greater satisfaction for a just and well-meaning person than the knowledge that he has devoted his best energies to the service of the good cause.

As the area of light expands, so does the perimeter of darkness.

Just because you believe in something does not mean that it is true.

Strive not to be a success, but rather to be of value.

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

Analytics will never tell you everything you want to know.