Neither the inveterateness of the mischief, nor the prevalency of the fashion, shall be any excuse for those who will not take care about the meaning of their own words, and will not suffer the insignificancy of their expressions to be inquired into.
John LockeParents wonder why the streams are bitter, when they themselves have poisoned the fountain.
John LockeAs it is in the body, so it is in the mind; practice makes it what it is, and most even of those excellencies, what are looked on as natural endowments, will be found, when examined into more narrowly, to be the product of exercise, and to be raised to that pitch, only by repeated actions.
John LockeThe difference, so observable in men's understandings and parts, does not arise so much from their natural faculties, as acquired habits.
John Locke