Us. By this parable, Joatham expostulates with the men of Sichem, who had so basely requited the labours of Gedeon, and had given the preference to the son of a servant, who was of the most savage temper. (Haydock)

In a spiritual sense, which the Fathers chiefly regard, heretics and schismatics act in this manner, and choose rather to be governed by those who will allow them to follow their passions, than by such governors as God has appointed, though the latter be endued with the grace of the Holy Ghost, and with all virtues, signified by the olive and other fruit trees. They prefer the bramble, or the worst dispositions, like Nemrod, Mahomet, Antichrist, &c., who, after persecuting the virtuous, and Catholics for a time, (2 Thessalonians ii.) will, in the end, prove their ruin, though they themselves be involved in the common destruction. “Fire shall rise (says Ven. Bede, q. 6.) against this bramble, Antichrist, and shall devour him, and all his together.” (Worthington)

The use of parables has been very general. (Menochius)

Agrippa brought the Roman plebeians, who had retired to the sacred mount, to a sense of their duty, and to a love of mutual harmony with the nobles, by observing that the members once refused to supply the wants of the belly, because it did not labour like the rest. (Livy ii.)

In the application of these parables, Maimonides justly remarks, that we must consider their general scope, and not pretend to explain every circumstance; (More. Neboc.) a remark which Origen had already made. Many things are only added for the sake of ornament. (Haydock)

Thus we need not imagine that the people of Sichem offered the sovereign authority to many, who refused to accept of it, and at last only prevailed upon Abimelech. Gedeon had, indeed, rejected a similar offer, (chap. viii. 22.) and his other sons not endeavouring to retain the authority of their father, the Sichemites acceded to the petition of Abimelech, to anoint him king. This expression does not always imply a material unction, though such was used among the Jews. It signifies the granting of all the power of a king; in which sense it is applied to foreign princes, (Isaias lxv. 1.) and to Jesus Christ, (Daniel ix. 24.) who received the reality of that sovereign dominion, of which this unction was only a figure. (Calmet)