'I Am Not Worthy' in the Bible

whether he were not the Christ, John answered saying to them all, I indeed baptize you with water, but one mightier than I cometh, the latchet of whose shoes I am not worthy to unloose: he shall baptize you with the Holy Ghost and with fire:

Then Jesus went with them. And when he was now not far from the house, the centurion sent friends to him, saying to him, Lord, trouble not thyself; for I am not worthy that thou shouldest come under my roof.