John 20:27

Then saith he to Thomas, Reach hither thy finger, and see my hands; and reach hither thy hand, and put it into my side; and be not faithless, but believing.

The overpowering drama of this is worthy of the Son of God himself and his blessed apostles; and one cannot but reflect upon the poverty of the church of all ages which would have been sustained had not John the apostle provided this record of what happened.

Reach hither thy finger ... thy hand ... Neither Christ nor his religion has anything to hide, nothing to conceal or cover up, no issues to avoid or problems to evade. To every unbeliever of all ages, the challenge of the risen Christ still thunders across centuries and millennia: INVESTIGATE! Test the evidence; make your own examination of the facts; and be not faithless but believing. Thus, infidelity was rooted out of the sacred group, and thus it has been rooted out of the heart of every unbeliever throughout history who took the trouble to investigate. This gives the lie to the satanic falsehood that knowledge leads to unbelief. It is the opposite. Ignorance leads to unbelief, as do prejudice, sin, and rebellion in the heart.

Thomas is often called "the doubter," but this is only another example of dignifying sin with some other title than its true one. The Lord did not refer to Thomas as a doubter, but as an unbeliever.