John 6:64

There are some of you that believe not. — Later, the word “disciple” became synonymous with the word “believer,” but there are those now following Him just as they would follow any Rabbi, and, regarding Him as a merely human teacher, they fall short of the faith which was the first qualification for true discipleship. They had heard, it may be, the Sermon on the Mount, and such teaching as that of Matthew 13. In part they could understand this, and therefore in part believed; but when faith was really needed, it was found not really to exist: for faith is accepting what is not demonstrable to the mere reason, and seeing what is invisible.

From the beginning. — This is a relative term, and is to be interpreted from the context. It means here the beginning of their discipleship. He saw in their hearts the varying kinds of ground on which the good seed fell, and in their acts and words the varying effects. There were hearts like the hardened wayside, but it may have been ploughed; like the stony places, but that shelving rock may have been broken through; like the thorns, but they may have been rooted up; and all may have become, as some were, like the good and fruit-bearing ground.