There is not so contemptible a plant or animal that does not confound the most enlarged understanding.
John LockeIt is practice alone that brings the powers of the mind, as well as those of the body, to their perfection.
John LockeIt is of great use to the sailor to know the length of his line, though he cannot with it fathom all the depths of the ocean.
John LockeWhere danger shews it self, apprehension cannot, without stupidity, be wanting; where danger is, sense of danger should be; and so much fear as should keep us awake, and excite our attention, industry, and vigour; but not to disturb the calm use of our reason, nor hinder the execution of what that dictates.
John Locke