Do not expect to arrive at certainty in every subject which you pursue. There are a hundred things wherein we mortals. . . must be content with probability, where our best light and reasoning will reach no farther.
Isaac WattsA dogmatical spirit inclines a man to be censorious of his neighbors. Every one of his opinions appears to him written, as it were, with sunbeams, and he grows angry that his neighbors do not see it in the same light. He is tempted to disdain his correspondents as men of low and dark understandings because they do not believe what he does.
Isaac WattsDo not hover always on the surface of things, nor take up suddenly with mere appearances; but penetrate into the depth of matters, as far as your time and circumstances allow, especially in those things which relate to your profession.
Isaac Watts