Lastly, the Lord Jesus calls those blessed who are persecuted for righteousness’ sake (Matthew 5.10-12). He means those who are laughed at, mocked, despised, and ill-used because they endeavor to live as true Christians. Blessed are all such! They drink of the same cup as their Master drank. They are now confessing Him before men and He will confess them before His Father and the angels at the last day (Matthew 10.32-33).
Such are the eight great foundation stones which our Lord lays down. Eight great testing-truths are placed before us. They are opposed to the principles of the world and despised by it, but they are the standard for which all true believers should aim. – J. C. Ryle (1816-1900), from a meditation on Matthew 5.1-12.