Leon Trotsky

In a serious struggle there is no worse cruelty than to be magnanimous at an inopportune time.

If we had more time for discussion we should probably have made a great many more mistakes.

Old age is the most unexpected of all things that happen to a man.

Life is not an easy matter... You cannot live through it without falling into frustration and cynicism unless you have before you a great idea which raises you above personal misery, above weakness, above all kinds of perfidy and baseness.