We are from God. The person who knows God listens (akouei | ἀκούει | pres act ind 3 sg) to us, but whoever is not from God does (akouei | ἀκούει | pres act ind 3 sg) not listen (akouei | ἀκούει | pres act ind 3 sg) to us. By this we know the Spirit of truth and the spirit of error.
Reference
1 John 4:6
Sequence
351