Matthew Henry's Complete Bible Commentary
Verse 20
Note, 1. Those that devise mischief contrive, for the accomplishing of it, how to impose upon others; but it will prove, in the end, that they deceive themselves. Those that imagine evil, under colour of friendship, have their hearts full of this and the other advantage and satisfaction which they shall gain by it, but it is all a cheat. Let them imagine it ever so artfully, deceivers will be deceived. 2. Those that consult the good of their neighbours, that study the things which make for peace and give peaceable advice, promote healing attempts and contrive healing methods, and, according as their sphere is, further the public welfare, will have not only the credit, but the comfort of it. They will have joy and success, perhaps beyond their expectation. Blessed are the peace-makers. MHBCC 641.20