The virtue which he is to practise is not bounded by the standards set by law and custom, nor even by conventional morality. His standards are far higher and far nobler. For they are not measured by human weakness but by human possibility. If for so much of his lifetime they have to exist side by side with his shortcomings, the latter are not accepted but are resisted.
-- Notebooks Category 6: Emotions and Ethics > Chapter 1: Uplift Character > # 306