And the main authentication of Christ's claim at all times is simply this, that He makes the claim, and that there is that in Him which testifies to His truth, while there is that in the claim itself which is congruous to our instincts and needs. There was that in the bearing of Christ which commanded belief in natures which were not numbed and blunted by prejudice. The Capernaum courtier who came to Jesus expecting to bring Him down with him to heal his boy, when he saw Him felt he could trust Him, and returned alone. Jesus was conscious that He spoke of what He knew, and spoke of it truly. "I speak that which I have seen with My Father" (ver. 38). "My record is true" (ver. 14). "If I say the truth, why do ye not believe Me?" (ver. 46.) This consciousness, both of an intention to speak the truth and of a knowledge of the truth, in a mind so pellucid and sane, justly impressed candid minds in His own day, and is irresistibly impressive still.
Again, we judge of what is probable or improbable, credible or incredible, mainly by its congruity with our previous belief. Is our idea of God such that a personal revelation seems credible and even likely? Does this supposed revelation in Christ consist with previous revelations and with the knowledge of God and His will which those revelations have fostered? Does this final revelation actually bring us the knowledge of God, and does it satisfy the longings and pure aspirations, the thirst for God and the hunger for righteousness, which assert themselves in us like natural appetites? If so, then the untutored human heart accepts this revelation. It is its own verification. Light is its own authentication. Christ brings within our ken a God whom we cannot but own as God, and who is nowhere else so clearly revealed. It is this immediacy of authentication, this self-verification, to which our Lord constantly appeals.
3. But a great part of the self-revelation of Christ could best be made in action. Such a work as the healing of the impotent man was visible to all and legible by the dullest. If His words were sometimes enigmatic, such an action as this was full of significance and easily understood. By this compassionate restoration of the vital powers He proclaimed Himself the Father's Delegate, commissioned to express the Divine compassion and to exercise the Divine power to communicate life. This was meant to be an easy lesson by which men might learn that God is full of compassion, ceaselessly working for the good of men; that He is present among us seeking to repair the mischief resulting from sin, and to apply to our needs the fulness of His own life, and that Jesus Christ is the medium through whom He makes Himself accessible to us and available for us.
These works were done by our Lord not only to convince the people that they should listen to Him, but also to convince them that God Himself was present. "If I do not the works of My Father, believe Me not. But if I do, though ye believe not Me, believe the works, that ye may know, and believe, that the Father is in Me, and I in Him." It was this He strove to impress on the people, that God was with them. It was not Himself He wished them to recognise, but the Father in Him. "I seek not Mine own glory" (ver. 50). And therefore it was the kindness of the works He pointed to: "Many _good_ works have I showed you from My Father" (x. 32). He sought through these works to lead men to see how in His Person the Father was applying Himself to the actual needs of mankind. To accept God for one purpose is to accept Him for all. To believe in Him as present to heal naturally leads to belief in Him as our Friend and Father. Hence these signs, manifesting the presence and good-will of God, were a call upon men to trust Him and accept His messenger. They spoke of gifts still more akin to the Divine nature, of gifts not merely physical, but spiritual and eternal. Possibly in allusion to these intelligible and earthly signs our Lord said to Nicodemus, "If I have told you earthly things, and ye believe not, how shall ye believe, if I tell you of heavenly things?" If ye are blind to these earthly signs, what hope is there of your understanding things eternal in their own impalpable essence?