John Gills Exposition of the Bible Commentary - Proverbs 30:21
For three things the earth is disquieted ,.... The inhabitants of it are made very uneasy; and for four which it cannot bear ; they are a load and burden upon it, and are intolerable to those that dwell on it, and make them very uncomfortable. read more
Matthew Henry's Complete Commentary - Proverbs 30:18-23
Here is, I. An account of four things that are unsearchable, too wonderful to be fully known. And here, 1. The first three are natural things, and are only designed as comparisons for the illustration of the last. We cannot trace, (1.) An eagle in the air. Which way she has flown cannot be discovered either by the footstep or by the scent, as the way of a beast may upon ground; nor can we account for the wonderful swiftness of her flight, how soon she has gone beyond our ken. (2.) A serpent... read more