As for you, the anointing which you received from him remains in you, and you don't need for anyone to teach you. But as his anointing teaches you concerning all things, and is true, and is no lie, and even as it taught you, you will remain in him.
but as the same anointing teacheth you of all things: "But" is alla, and means "on the contrary" (Lenski 442). John is saying that there is no need for someone to teach these truths over and over; "on the contrary," the "same anointing" continues to teach you everything you need to know. The word of God, which is this anointing, "hath given unto us all things that pertain unto life and godliness" (2 Peter 1:3). It is "profitable for teaching" (2 Timothy 3:16).