When you want to put something into your part that is not in the play, you must ask the author-or some other author-to lead up to the interpolation for you. Never forget that the effect of a line may depend not on its delivery, but on something said earlier in the play, either by somebody else or by yourself, and that if you change it, it may be necessary to change the whole first act as well.

When a thing is funny, search it carefully for a hidden truth.

The notion that disarmament can put a stop to war is contradicted by the nearest dogfight.

It's a pity youth is wasted on the young.

Few of us have vitality enough to make any of our instincts imperious.

Whisky is liquid sunshine.

[...] any fool can make a discovery. Every baby has to discover more in the first years of its life than Roger Bacon ever discovered in his laboratory.