Holiness or sainthood is a gift (charisma) given by God to man, through the Holy Spirit. Man's effort to become a participant in the life of divine holiness is indispensable, but sanctification itself is the work of the Holy Trinity, especially through the sanctifying power of Jesus Christ, who was incarnate, suffered crucifixion, and rose from the dead, in order to lead us to the life of holiness, through the communion with the Holy Spirit. In the Second Letter to the Thessalonians St. Paul suggests: "But we are bound to thank God always for you, brothers beloved by the Lord, because from the beginning of time God chose you to find salvation in the Spirit that consecrates you, (en agiasmo Pneumatos) and in the truth that you believe. It was for this that He called you through the Gospel we brought, so that you might possess for your own the splendor of our Lord Jesus Christ" (2: 13-14).