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.
The readers’ anointing was real. The false teachers appear to have claimed that God had inspired them, but He had not. John was warning his readers about false teachers who claimed revelation beyond what Jesus Christ and the apostles had taught. We need simply to abide in God and to respond positively to the Holy Spirit’s ministry to us (cf. John 15:4-7).