Mark 6:5

Could there do no mighty work; because of their unbelief, as is added by Matthew, Matthew 13:58. This is an instance of the manner in which the words can and cannot are sometimes used in the Bible: he could not consistently, or with propriety; there do many mighty works. He healed a few, but not many; not because he had not power, but for other reasons. In order to understand correctly the meaning of words which speak of ability and inability, as used in the Bible, we must consider the subject about which they were spoken, the connection in which they are found, and the manner in which the speaker and writer used them.