"As a means of variation from a normal type, sickness in childhood ought to have a certain value not to be classed under any fitness or unfitness of natural selection; and especially scarlet fever affected boys seriously, both physically and in character, though they might through life puzzle themselves to decide whether it had fitted or unfitted them for success."

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All the martyrs in the history of the world are not sufficient to establish the correctness of an opinion. Martyrdom, as a rule, establishes the sincerity of the martyr, - never the correctness of his thought. Things are true or false in themselves. Truth cannot be affected by opinions; it cannot be changed, established, or affected by martyrdom. An error cannot be believed sincerely enough to make it a truth.

— Robert Green Ingersoll