“And he could there do no mighty work, save that he laid his hands upon a few sick folk, and healed them.”
King James Version (KJV)
6:5 He could do no miracle there - Not consistently with his wisdom and goodness. It being inconsistent with his wisdom to work them there, where it could not promote his great end; and with his goodness, seeing he well knew his countrymen would reject whatever evidence could be given them. And therefore to have given them more evidence, would only have increased their damnation.
Mr 6:5 He could there do no mighty work. Matthew states the reason: "Because of their unbelief" (Mt 13:58). It was not from want of power, but of the conditions that he required. Those in need of help must either have faith enough to seek his help, or their friends must have faith. As faith is the condition of the salvation of the soul, so Christ required it as a condition of the salvation of the body from disease or death.