Pray the following prayer for nine consecutive days
Almighty and ever-living God, who strengthened your Apostle, Thomas, with sure and certain faith in Your Son's Resurrection: Grant us so perfectly and without doubt to believe in Jesus Christ, our Lord, and our God, and our faith may never be found wanting in Your sight; through Him, who lives and reigns with You and the Holy Spirit, one God, now and forever.
Dear Saint Thomas, you were once slow in believing that Christ had gloriously risen; but later, because you had seen him, you exclaimed, "My Lord and my God!" According to an ancient story, you rendered most powerful assistance for constructing a church in a place where pagan priests opposed it. Please bless architects, builders, and carpenters that through them the Lord may be honored. Amen.
O Glorious Saint Thomas, your grief for Jesus was such that it would not let you believe he had risen unless you actually saw him and touched his wounds. But your love for Jesus was equally great and led you to give up your life for Him. Pray for us that we may grieve for our sins which were the cause of Christ's sufferings. Help us to spend ourselves in His service and so to earn the title of "Blessed" which Jesus applied to those who would believe in Him without seeing Him.