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.
Isaac Watts, Philip Doddridge, David JENNINGS (1819). “The Improvement of the Mind ... By Isaac Watts, D.D. Also His Posthumous Works Published from His Manuscripts by D. Jennings, D.D. and P. Doddridge”, p.21
