“I speak to all in general, for this is the end. All have one goal, salvation. All have one law, love. From this every virtue is born: humility, compassion, mercy, and the rest. Among them, oneness of mind is complete and undivided agreement in some matter. Compassion is pity for those who suffer evil, as for ourselves. Brotherly love is the disposition toward neighbors that ought to be shown to brothers. Tender mercy is the soul’s inclination to do good to those of the same nature. Love of wisdom is meekness and friendliness toward all, as toward acquaintances and friends. Humility, or humble-mindedness, is the endurance of reproach from another, the consciousness of one’s sinfulness, and the endurance of accusations. This could be called good-mindedness. Insult is a tendency toward slander arising from a bad habit. Adorn yourselves, then, with these virtues” (Theophylact).
“Knowing that you,” and so forth: as disciples of Christ and children of God, you have been called to bless, not to curse, your enemies. By this very thing you yourselves will inherit the blessing of God (Lk 6:38 and parallels), both here on earth and in Heaven, in the Kingdom of Heaven.
“To inherit”: see Mt 5:5.