Our death is not an end if we can live on in our children and the younger generation. For they are us; our bodies are only wilted leaves on the tree of life.

Pure mathematics is, in its way, the poetry of logical ideas.

If I were to start taking care of my grooming, I would no longer be my own self.

Most mistakes in philosophy and logic occur because the human mind is apt to take the symbol for the reality.

Keep on sowing your seed, for you never know which will grow - perhaps it all will.

In the teaching of geography and history a sympathetic understanding (should) be fostered for the characteristics of the different peoples of the world, especially for those who we are in the habit of describing as "primitive.

When I have one week to solve a seemingly impossible problem, I spend six days defining the problem. Then, the solution becomes obvious.