“Successful men of all the ages have learned to multiply themselves by gathering thought energy into a high potential and using it in the direction of the purpose intended. Every successful man or great genius has three particular qualities in common. The most conspicuous of these is that their minds grow more brilliant as they grow older, instead of less brilliant. Great men’s lives begin at forty, where the mediocre man’s life ends. The genius remains an ever-flowing fountain of creative achievement until the very last breath he draws. The geniuses have learned how to gather thought energy together to use for transforming their conceptions into material forms. The thinking of creative and successful men is never exerted in any direction other that that intended. That is why great men produce a prodigious amount of work, seemingly without effort and without fatigue. The amount of work such men leave to posterity is amazing. When one considers such men of our times as Edison, Henry Ford or Theodore Roosevelt, one will find the three characteristics I have mentioned common to every one of them.”

1900s, Address at the Prize Day Exercises at Groton School (1904)

1840s, Essays: Second Series (1844), Nominalist and Realist

Caxtoniana: Hints on Mental Culture (1862)

Source: Inferno

On Dramatic Poetry (1758)

Lessons : An Autobiography (1986)

Source: Wings of Fire, p. 32.

Alphonse de Lamartine, Histoire de la Turquie (1854), Vol. I, pp. 276-277
Context: Never has a man set for himself, voluntarily or involuntarily, a more sublime aim, since this aim was super human; to subvert superstitions which had been imposed between man and his Creator, to render God unto man and man unto God; to restore the rational and sacred idea of divinity amidst the chaos of the material and disfigured gods of idolatry, then existing. Never has a man undertaken a work so far beyond human power with so feeble means, for he Muhammad had in the conception as well as in the execution of such a great design, no other instrument than himself and no other aid except a handful of men living in a corner of the desert. Finally, never has a man accomplished such a huge and lasting revolution in the world, because in less than two centuries after its appearance, Islam, reigned over the whole of Arabia, and conquered, in God's name, Persia, Khorasan, Transoxania, Western India, Syria, Egypt, Abyssinia, all the known continent of Northern Africa, numerous islands of the Mediterranean Sea, Spain and part of Gaul.
If greatness of purpose, smallness of means, and astounding results are the three criteria of human genius, who could dare to compare any great man in modern history with Muhammad? The most famous men created arms, laws and empires only. They founded, if anything at all, no more than material powers which often crumbled away before their eyes. This man moved not only armies, legislations, empires, peoples and dynasties, but millions of men in one-third of the then inhabited world; and more than that, he moved the altars, the gods, the religions, the ideas, the beliefs and souls... his forbearance in victory, his ambition, which was entirely devoted to one idea and in no manner striving for an empire; his endless prayers, his mystic conversations with God, his death and his triumph after death; all these attest not to an imposture but to a firm conviction which gave him the power to restore a dogma. This dogma was twofold, the unity of God and the immateriality of God; the former telling what God is, the latter telling what God is not; the one overthrowing false gods with the sword, the other starting an idea with words.
Philosopher, orator, apostle, legislator, warrior, conqueror of ideas, restorer of rational dogmas, of a cult without images; the founder of twenty terrestrial empires and of one spiritual empire, that is Muhammad. As regards all standards by which human greatness may be measured, we may well ask, is there any man greater than he?