Nothing is so difficult as not deceiving oneself.

Philosophy is like trying to open a safe with a combination lock: each little adjustment of the dials seems to achieve nothing, only when everything is in place does the door open.

We feel that even if all possible scientific questions be answered, the problems of life have still not been touched at all.

The feeling of an unbridgeable gulf between consciousness and brain-process:When does this feeling occur in the present case?It is when I (for example) turn my attention in a particular way on to my own consciousness, and, astonished, say to myself: THIS is supposed to be produced by a process in the brain!--as it were clutching my forehead.

Resting on your laurels is as dangerous as resting when you are walking in the snow. You doze off and die in your sleep.

Suppose we think while we talk or write--I mean, as we normally do--we shall not in general say that we think quicker than we talk, but the thought seems not to be separate from the expression.

When we think about the future of the world, we always have in mind its being where it would be if it continued to move as we see it moving now. We do not realize that it moves not in a straight line and that its direction changes constantly.