‘The day following Jesus would go forth into Galilee, and findeth Philip.’ It would seem, if we read it correctly, just before he leaves he meets Philip, another disciple-to-be.
Christ demands total loyalty and commitment from his disciples – ‘Follow me.’ Some people could never do that. They say, I see what Christ has done for sinners, and am ready to be changed by him, but to pledge myself to him, to take his direction in everything, I cannot do that. If so then you cannot be saved. You must be ready to give your heart to him and to submit to him as Lord.