Our Lord calleth them to a work they never thought of, the owning and acknowledgment of him to be the true Messiah; the embracing and receiving him as such, and trusting him with all the concerns of their souls; which was necessary, notwithstanding all their acts of obedience to the law, though most certainly productive also of that obedience, and inseparable from it. This our Saviour calleth the work of God, in answer to what they had said about working the works of God. Yet this will not prove that we are justified by works, because we are justified by faith; for here is no discourse concerning the causation of faith in the justification of a soul, but only concerning what is the will of God, as to all those that shall be saved.
Related Commentaries of John 6:29
John 6:29
29 Jesus answered and said unto them,This is the work of God, that ye believe on him whom he hath sent.