A high degree of intellect tends to make a man unsocial.

Wicked thoughts and worthless efforts gradually set their mark on the face, especially the eyes.

Vengeance taken will often tear the heart and torment the conscience.

What a person is for himself, what abides with him in his loneliness and isolation, and what no one can give or take away from him, this is obviously more essential for him than everything that he possesses or what he may be in the eyes of others.

It is only in the microscope that our life looks so big.

A man can be himself only so long as he is alone.

There is only one inborn erroneous notion ... that we exist in order to be happy ... So long as we persist in this inborn error ... the world seems to us full of contradictions. For at every step, in great things and small, we are bound to experience that the world and life are certainly not arranged for the purpose of maintaining a happy existence ... hence the countenances of almost all elderly persons wear the expression of ... disappointment.