Do 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.
Source: In The Speaker's Electronic Reference Collection, AApex Software, 1994.
-- Isaac Watts, (Jul 17 1674-1748), English minister; He is regarded as the father of English hymnody and best known for When I Survey the Wondrous Cross, 1707.