Let not men think there is no truth but in the sciences that they study, or the books that they read. To prejudge other men's notions before we have … - John Locke

To prejudge other men's notions before we have looked into them is not to show their darkness but to put out our own eyes.

Those truly natural wants, which reason alone, without some other help, is not able to fence against, nor keep from disturbing us. The pains of sickness and hurts, hunger, thirst, and cold, want of sleep and rest or relaxation of the part weary'd with labour, are what all men feel and the best dispos'd minds cannot but be sensible of their uneasiness; and therefore ought, by fit applications, to seek their removal, though not with impatience, or over great haste, upon the first approaches of them, where delay does not threaten some irreparable harm. The pains that come from the necessities of nature, are monitors to us to beware of greater mischiefs, which they are the forerunner of; and therefore they must not be wholly neglected, and strain'd too far. But yet the more children can be inur'd to hardships of this kind, by a wise care to make them stronger in body and mind, the better it will be for them.

He that had as good left for his improvement as was already taken up, needed not complain, ought not to meddle with what was already improved by another's labour:

There are a thousand ways to Wealth, but only one way to Heaven.