He who is of calm and happy nature will hardly feel the pressure of age, but to him who is of an opposite disposition youth and age are equally a burden.

He who is not a good servant will not be a good master.

To prefer evil to good is not in human nature; and when a man is compelled to choose one of two evils, no one will choose the greater when he might have the less.

I have hardly ever known a mathematician who was capable of reasoning

I am calm, ... My surname is not a burden for me. It might be for others, but not for me.

Old age has a great sense of calm and freedom.