El fin, pues, mayor y principal de los hombres que se unen en comunidades políticas y se ponen bajo el gobierno de ellas, es la preservación de su pr… - John Locke

A sound mind in a sound body, is a short, but full description of a Happy state in this World: he that has these two, has little more to wish for; and he that wants either of them, will be little better for anything else.

govern his actions according to the dictates of the law of reason which God had implanted in him.

I doubt not but one great reason why many children abandon themselves wholly to silly sports, and trifle away all their time insipidly, is, because they have found their curiosity baulk'd, and their inquiries neglected. But had they been treated with more kindness and respect, and their questions answered, as they should, to their satisfaction; I doubt not but that they would have taken more pleasure in learning, and improving their knowledge, wherein there would still be newness and variety, which is what they are delighted with, than in returning over and over to the same play and play-things.