The human mind is not capable of grasping the Universe. We are like a little child entering a huge library. The walls are covered to the ceilings with books in many different tongues. The child knows that someone must have written these books. It does not know who or how. It does not understand the languages in which they are written. But the child notes a definite plan in the arrangement of the books---a mysterious order which it does not comprehend, but only dimly suspects.
A man has to work so hard so that something of his personality stays alive. A tomcat has it so easy, he has only to spray and his presence is there for years on rainy days.
The only source of knowledge is experience
The problems that exist in the world today cannot be solved by the level of thinking that created them.
The man of science is a poor philosopher.
The minority, the ruling class at present, has the schools and press, usually the Church as well, under its thumb. This enables it to organize and sway the emotions of the masses, and make its tool of them.
The most incomprehensible thing about the world is that it is at all comprehensible.
The mystical trend of our time, which shows itself particularly in the rampant growth of the so-called Theosophy and Spiritualism, is for me no more than a symptom of weakness and confusion. Since our inner experiences consist of reproductions, and comb inations of sensory impressions, the concept of a soul without a body seem to me to be empty and devoid of meaning.
The only justifiable purpose of political institutions is to insure the unhindered development of the individual.
Common sense is nothing more than a deposit of prejudices laid down in the mind before you reach eighteen.