Henry Sidgwick,
The Methods of Ethics
“ It is scarcely doubtful that a modest, diffident, and retiring nature, distrustful of its own abilities, and shrinking with humility from conflict, produces on the whole less benefit to the world than the self-assertion of an audacious and arrogant nature, which is impelled to every struggle, and develops every capacity. Gratitude has no doubt done much to soften and sweeten the intercourse of life, but the corresponding feeling of revenge was for centuries the one bulwark against social anarchy, and is even now one of the chief restraints to crime. ”
