Charles Ellicott Commentary John 15:3

"Already ye are clean because of the word which I have spoken unto you." — John 15:3 (ASV)

Now ye are clean.—Better, Already are you clean. The pronoun is emphatic. “Already are you, as distinct from others who will become clean in the future.” (Compare Note on John 13:10.)

Through the word which I have spoken unto you.—Better, on account of the word which I have spoken to you. The word was the revelation of God to them, and because of its moral power they had been cleansed. We are not to limit the reference to John 13:10, but are to understand it of our Lord’s whole teaching. (John 8:31–32; John 12:48; John 17:10; and compare Note on Ephesians 5:26.)