We may feel that to follow this teaching is to try something which is totally beyond our capacity, that it would require a tremendous amount of will-power and that it would only encourage those people to behave even worse. In the Old Testament hatred of evildoers is presumed to be the right attitude to have. But Jesus is extending love to the enemy and the persecutor.
This is the core of Jesus’ teaching, which he himself practised. The Golden Rule which is often expressed as “Do not do to others what you would not want them do to you” is expressed here in positive terms.