1 Peter 4:13-14

13 but to the degree that you share the sufferings of Christ, keep on rejoicing, so that also at the revelation of His glory you may rejoice with exultation. 14 If you are reviled for the name of Christ, you are blessed, because the Spirit of glory and of God rests on you.

When we suffer for Christ (for being a Christian) we share His sufferings. For that we can rejoice; and we will rejoice much more when He comes; for we will be greatly blessed because the Spirit of God and His glory will be upon us.It will be a great party!