Even if one takes every reefer madness allegation of the prohibitionists at face value, marijuana prohibition has done far more harm to far more people than marijuana ever could.
— William F. Buckley, Jr.

Alleged "impossibilities" are opportunities for our capacities to be stretched.
Charles R. Swindoll allegedly quote

Perfectionism, no less than isolationism or imperialism or power politics, may obstruct the paths to international peace. Let us not forget that the retreat to isolationism a quarter of a century ago was started not by a direct attack against international cooperation but against the alleged imperfections of the peace.
— Franklin D. Roosevelt

Want of money and the distress of a thief can never be alleged as the cause of his thieving, for many honest people endure greater hardships with fortitude. We must therefore seek the cause elsewhere than in want of money, for that is the miser's passion, not the thief s.
— William Blake

Generosity is a part of my character, and I therefore hasten to assure this Government that I will never make an allegation of dishonesty against it wherever a simple explanation of stupidity will suffice.
— allegedly quotation by Leslie Baron Lever