Barring my faulty memory (and if I’m not lazy) I want to post prayers on Monday from all over Church History and then throughout the modern day, and then my own. This comes from the Book of Common Prayer for Thomas Sunday.
Almighty and everliving 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,
that 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 for ever.