O generation of vipers] See on Chap. 3. 7. how can ye, being evil, speak good things] Hypocrites at some time or others, will bewray themselves by their words. for out of the abundance, &c.] Luke 6:45. Abundance of bad humours in the body, may be kept in for a time, but they will finde a time to break out: so will abundance of bad thoughts finde a vent by the tongue.