You learned the concept 'pain' when you learned language.

Propositions show what they say: tautologies and contradictions show that they say nothing.

For remember that in general we don't use language according to strict rules-- it hasn't been taught to us by means of strict rules, either. We, in our discussions on the other hand, constantly compare language with a calculus preceding to exact rules.

A French politician once wrote that it was a peculiarity of the French language that in it words occur in the order in which one thinks them.

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.

It is possible--indeed possible even according to the old conception of logic--to give in advance a description of all 'true' logical propositions. Hence there can never be surprises in logic.

If people did not sometimes do silly things, nothing intelligent would ever get done.