First, here is light thrown upon the relation between faith and discipleship. It is clear that our Lord here uses the word for the first time in the full Christian sense, that He regards the exercise of faith as being practically synonymous with being a disciple, that from the very first, believers were disciples, and disciples were believers.
Then, notice still further that our Lord here employs the word 'belief' without any definition of what or whom it is that they were to believe. He Himself, and not certain thoughts about Him, is the true object of a man's faith. We may believe a proposition, but faith must grasp a person. Even when the person is made known to us by a proposition which we have to believe before we can trust the person, still the essence of faith is not the intellectual process of laying hold upon a certain thought, and acquiescing in it, but the moral process of casting myself in full confidence upon the Being that is revealed to me by the thought,—of laying my hand, and leaning my weight, on the Man about whom it tells me. And so faith, which is discipleship, has in it for its very essence the personal element of trust in Jesus Christ.
Then, further, notice how widely different from our creed was Nathanael's creed, and yet how identical with our faith, if we are Christians, was Nathanael's faith. He knew nothing about the very heart of Christ's work, His atoning death. He knew nothing about the highest glory of Christ's person, His divine Sonship, in its unique and lofty sense. These lay unrevealed, and were amongst the greater things which he was yet to see; but though thus his knowledge was imperfect, and his creed incomplete as compared with ours, his faith was the very same. He laid hold upon Christ, he clave to Him with all his heart, he was ready to accept His teaching, he was willing to do His will, and as for the rest—'Thou shalt see greater things than these.' So, dear brethren, from these words of my text here, from the unhesitating attribution of the lofty notion of faith to this man, from the way in which our Lord uses the word, are gathered these three points that I beseech you to ponder: there is no discipleship without faith; faith is the personal grasp of Christ Himself; the contents of creeds may differ whilst the element of faith remains the same. I beseech you let Christ come to you with the question of my text, and as He looks you in the eyes, hear Him say to you, 'Believest _thou_?'
Secondly, notice how in this great promise to the new disciples there is light thrown upon another subject, viz. the connection between faith and sight. There is a great deal about seeing in this context. Christ said to the first two that followed Him, 'Come and see.' Philip met Nathanael's thin film of prejudice with the same words, 'Come and see.' Christ greeted the approaching Nathanael with 'When thou wast under the fig tree I saw thee.' And now His promise is cast into the same metaphor: 'Thou shalt see greater things than these.'
There is a double antithesis here. 'I saw thee,' 'Thou shalt see Me.' 'Thou wast convinced because thou didst feel that thou wert the passive object of My vision. Thou shalt be still more convinced when illuminated by Me. Thou shalt see even as thou art seen. I saw thee, and that bound thee to Me; thou shalt see Me, and that will confirm the bond.'
There is another antithesis, namely—between believing and seeing. 'Thou believest—that is thy present; thou shalt see, that is thy hope for the future.' Now I have already explained that, in the proper primary meaning and application of the words, the sight which is here promised is simply the observance with the outward eye of the historical facts of our Lord's life which were yet to be learned. But still we may gather a truth from this antithesis which will be of use to us. 'Thou believest—thou shalt see'; that is to say, in the loftiest region of spiritual experience you must believe first, in order that you may see.