Paradoxical as it may seem, to believe in youth is to look backward; to look forward we must believe in age.

There certainly does seem a possibility that the detective story will come to an end, simply because the public will have learnt all the tricks.

A human being must have occupation, of he or she is not to become a nuisance to the world.

The farther backward you can look, the farther forward you can see.

You can't look forward and backward at the same time.

I gratefully look forward to oblivion, but I must be sure of it.