A statement by Baha’u’llah, founder of the Baha’i Faith, always reminds me of ‘doubting Thomas’;
Say: The first and foremost testimony establishing His truth is His own Self.
Next to this testimony is His Revelation.
For whoso faileth to recognize either the one or the other He hath established the
words He hath revealed as proof of His reality and truth. – Gleanings LII / pp 104/107
“But Thomas (who was called the Twin), one of the twelve, was not with them when Jesus came. So the other disciples told him, “We have seen the Lord.” But he said to them, “Unless I see the mark of the nails in his hands, and put my finger in the mark of the nails and my hand in his side, I will not believe.”” – (John 20:24–25 NRSV)