Nature has given us two ears, two eyes and but one tongue, to the end that we should hear and see more than we speak.

Socrates (c.470–399 BC) Greek philosopher

(Attributed)

In Robert Christy, Proverbs, Maxims and Phrases of All Ages (1887). Unable to find an actual citation; closest is Plutarch, Essays, "On Listening", 39B [tr. Waterfield (1992)], quoting Zeno of Citium: "And it is said that Nature gave each of us two ears, but one tongue, because we should listen more than we speak."