“We too often forget that not only is there 'a soul of goodness in things evil,' but very generally also, a soul of truth in things erroneous.”

“The great aim of education is not knowledge but action.”

“As a corollary to the proposition that all institutions must be subordinated to the law of equal freedom, we cannot choose but admit the right of the citizen to adopt a condition of voluntary outla...”

“They who employ force by proxy are as much responsible for that force as though they employed it themselves.”

“Evolution is an integration of matter and concomitant dissipation of motion during which the matter passes from an indefinite incoherent homogeneity to a definite coherent heterogeneity, and during...”

“If a single cell, under appropriate conditions, becomes a man in the space of a few years, there can surely be no difficulty in understanding how, under appropriate conditions, a cell may, in the c...”