It is often a great test for Christians to joyfully and gladly bear slander. It is hard for them to have so-called friends speak evil of them to others when they are standing firm and true for God. This is only until they love their Lord enough to enjoy suffering with Him. He was and is evil spoken of, and if we love Him above all else, we are glad for the privilege of sharing in His sufferings.
The Apostle Paul knew what it was to suffer for and with his Lord. He loved to be counted worthy of this and he said, "Yea, and all that will live godly in Christ Jesus shall suffer persecution." 2 Tim. 3:12. He expected nothing else than to suffer for the One who suffered for him.
The Lord Jesus calls those blessed who suffer for Him. He said, "Blessed are ye, when men shall revile you, and persecute you, and shall say all manner of evil against you falsely, for My sake. Rejoice, and be exceeding glad: for great is your reward in heaven." Matt. 5:11, 12.
When the apostles were put in prison for Jesus' sake, they were happy. After they were taken from prison they were also beaten and told to speak no more in the name of Jesus. Do you think this made them sad? No; we read of them, "They departed from the presence of the council, rejoicing that they were counted worthy to suffer shame for His name." Acts 5:41.
Peter was one of the apostles who rejoiced because he was counted worthy to suffer these things. He knew it brought him much joy to suffer for his blessed Lord, so later on he wrote to other Christians saying: "Beloved, think it not strange concerning the fiery trial which is to try you, as though some strange thing happened unto you: but rejoice, inasmuch as ye are partakers of Christ's sufferings; that, when His glory shall be revealed, ye may be glad also with exceeding joy. If ye be reproached for the name of Christ, happy are ye." 1 Pet. 4:12-14.
So dear Christian, do not grieve or be sad when you are evil spoken of, but count it a joy, as Jas. 1:2 says. The Lord Jesus specially favors you when He allows you to bear suffering and shame for His sake. It is because He has set His love upon you, and because He would have you share in something so very precious.