The one who practices this principle can be a great man. God has been living His life for the sake of human beings, and He has been persecuted. Through this kind of course, He shall get the final victory. If you get complete victory over the whole that has persecuted, the new age will come. Persecution is the condition to move Satan's ownership to God's.
Persecution is the shortcut to unity, therefore a man of principle goes the way of persecution.
If you hit strongly, you shall be hit more strongly. Think of your persecutors and opponents as your elder brothers.