Albert Barnes Commentary John 14:15

"If ye love me, ye will keep my commandments." — John 14:15 (ASV)

If you love me. Do not show your love merely by grief at my departure, or by profession, but by obedience.

Keep my commandments. This is the only proper evidence of love for Jesus, for mere profession is no proof of love; but that love for him which leads us to do all his will, to love each other, to deny ourselves, to take up our cross, and to follow him through evil report and good report, is true attachment.

The evidence we have that a child loves its parents is when that child is willing, without hesitation, objecting, or murmuring, to do all that the parent requires him to do.

So the disciples of Christ are required to show that they are attached to him supremely by yielding to all his requirements and by patiently doing his will in the face of ridicule and opposition (1 John 5:2–3).