'Sinful' in the Bible

Some of the Pharisees therefore said, This man is not of God, for he does not keep the sabbath. Others said, How can a sinful man perform such signs? And there was a division among them.

They called therefore a second time the man who had been blind, and said to him, Give glory to God: we know that this man is sinful.

He answered therefore, If he is sinful I know not. One thing I know, that, being blind before, now I see.