Charles Ellicott Commentary John 15:19

"If ye were of the world, the world would love its own: but because ye are not of the world, but I chose you out of the world, therefore the world hateth you." — John 15:19 (ASV)

If you were of the world, the world would love its own.—The force of the expression indicates the utter selfishness of the world’s love. It would love not them, but that in them which was its own. (Compare to Note on John 7:7.)

I have chosen you out of the world.—Compare to John 15:16, and Note on John 7:7. There He had told them that the world could not hate them. The very fact of its hatred would prove a moral change in them, by which they had ceased to belong to the world, and had become the children of God. Both thoughts are repeated in 1 John 3:13; 1 John 4:5.