John 20:25 - The other disciples, therefore, said unto him (Thomas), We have seen the Lord. But he said unto them, Except I shall see in his hands the print of the nails, and put my finger into the print of the nails, and thrust my hand into his side, I will not believe
Thomas' faith was head faith. And Jesus did not commend Thomas for it. Jesus said, "You have believed because you have seen." Anyone can have that kind of faith, whether he be saint or sinner. That's head faith. Head faith is believing what your physical senses tell you.
Jesus commended heart faith. He said, "...blessed are they that have not seen, and yet have believed" (v.29). To believe with the heart means to believe apart from what your physical body or physical senses may indicate.
The physical man believes what he sees with his physical eyes, hears with his physical ears, or feels with his physical senses. But the heart, on the other hand, believes in the Word of God regardless of what the physical senses say.
Confession: I am not faithless; I am believing. I believe according to what God's Word says, regardless of what I see, hear, or feel.