John 14:28

On the contrary quite other feelings should possess them: joy in sympathy with Him in His glorification and in expectation of the results of His going to the Father: ἠκούσατε … πατέρα. “If ye loved me,” an almost playful way of reproaching their sadness. There was no doubt of their love, but it was an unintelligent love. They failed to consider the great joy that awaited Him in His going to the Father. This going to the Father was cause for rejoicing, ὅτι ὁ πατήρ μου [μου is not well authenticated and should be deleted] μείζων μου ἐστί, “because the Father is greater than I”; and can therefore fulfil all the loving purposes of Christ to His disciples. “The life which He has begun with them and for them will be raised to a higher level.” They had seen the life He had lived and were disturbed because it was coming to an end: but it was coming to an end because absorbed in the greater life He would have with the Father. The theological import of the words is discussed by Westcott, who cites patristic opinions and refers to Bull and Pearson. In all that Jesus did, it was the Father's will He carried out, and with powers communicated by the Father: the Father is the Originator and End of all His work in the world. Throughout the ministry of Jesus the Father is represented as “greater” than the Son. That it should require to be explicitly affirmed, as here, is the strongest evidence that He was Divine.