The pure natural scientist is liable to forget that minds exist, and that if it were not for them he could neither know nor act on physical objects.

In Psychology we deal with minds and their processes, and leave out of account as far as possible the objects that we get to know by means of them.

Common sense says that chairs and tables exist independently of whether anyone happens to perceive them or not.

Love that is not jealous is neither true nor pure.

It should now be clear why the method of Philosophy is so different from that of the natural sciences. Experiments are not made, because they would be utterly useless.

I was not influenced by composers as much as by natural objects and physical phenomena.