Can you say you believe Jesus of Nazareth is Christ the Messiah? Doubting Thomas did, as told in John 20, verses 24 to 29 (KJV):
24 But Thomas, one of the twelve, called Didymus, was not with them when Jesus came. 25 The other disciples therefore said unto him, 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.
26 And after eight days again his disciples were within, and Thomas with them: then came Jesus, the doors being shut, and stood in the midst, and said, Peace be unto you. 27 Then saith he to Thomas, Reach hither thy finger, and behold my hands; and reach hither thy hand, and thrust it into my side: and be not faithless, but believing. 28 And Thomas answered and said unto him, My Lord and my God. 29 Jesus saith unto him, Thomas, because thou hast seen me, thou hast believed: blessed are they that have not seen, and yet have believed.
If you answered yes to the question above, Jesus is blessing YOU in verse 29. YOU have not seen (unless you are a LOT older than anyone I’m aware of) and yet you believe. Therefore Jesus has blessed YOU. It doesn’t matter if you are a sinner, (we all are sinners) YOU are blessed. It brings comfort to me to know that Jesus has blessed me, and I hope that it will also bring comfort to YOU.