By the false prophets are meant those, who to gain the favour of the multitude attempt to predict future events. The Lord on the mountain pronounces only the blessings of the good, but on the plain he describes also the “woe” of the wicked, because the yet uninstructed hearers must first be brought by terrors to good works, but the perfect need but be invited by rewards.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).