Herein is my Father glorified. — This clause is generally understood of the words which follow as it is taken in our English version, but the rendering is liable to the objection that it gives a forced meaning to the word “that” (Ἱυα), which is properly used to express purpose. We may here (as in John 4:37; John 16:30) take “herein” to refer to the words which have gone before. By so doing we give a natural meaning to the words, and get a satisfactory sense for the sentence. The thought then will be, “In this doing whatever ye ask, my Father is glorified, in order that ye may bear much fruit, and that ye may become my disciples.”
So shall ye be my disciples. — Better, and may become My disciples. The pronoun is strongly emphatic. The living union with Christ, which made all their prayers, prayers in His name, and prayers which He would answer, and made them abound with fruit to the glory of God, was the characteristic which marked them as His true disciples.