Sometimes you have to let go to see if there was anything worth holding onto.

Your most unhappy customers are your greatest source of learning.

I think my greatest ambition in life is to pass on to others what I know.

Life consists in penetrating the unknown, and fashioning our actions in accord with the new knowledge thus acquired.

The only absolute knowledge attainable by man is that life is meaningless.

I only hope that when I am free, as they are free to go in quest, of the knowledge beyond the bounds of life, it may not seem better to me to rest.