The most important knowledge is that which guides the way you lead your life.

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

Spirit is the life that itself cuts into life: with its own torment it increases its own knowledge. Did you already know that?

The supreme guide in life is knowledge.

Our true mentor in life is science.

All knowledge which ends in words will die as quickly as it came to life, with the exception of the written word: which is its mechanical part.