Psychology is a science, and teaching is an art; and sciences never generate arts directly out of themselves.

Beyond the very extreme of fatigue and distress, we may find amounts of ease and power we never dreamed ourselves to own; sources of strength never taxed at all because we never push through the obstruction

The union of the mathematician with the poet, fervor with measure, passion with correctness, this surely is the ideal.

Round about the accredited and orderly facts of every science there ever floats a sort of dust-cloud of exceptional observations, of occurrences minute and irregular and seldom met with, which it always proves more easy to ignore than to attend to... Anyone will renovate his science who will steadily look after the irregular phenomena, and when science is renewed, its new formulas often have more of the voice of the exceptions in them than of what were supposed to be the rules.

The deepest longing in the human breast is the desire for appreciation.

The deepest principle in human nature is the craving to be appreciated.

Or if the hypothesis were offered us of a world in which Messrs. Fourier's and Bellamy's and Morris's Utopias should all be outdone, and millions kept permanently happy on the one simple condition that a certain lost soul on the far-off edge of things should lead a life of lonely torment, what except a specifical and independent sort of emotion can it be which would make us immediately feel, even though an impulse arose within us to clutch at the happiness so offered, how hideous a thing would be its enjoyment when deliberately accepted as the fruit of such a bargain?