We are from God. The person who knows (ginōskōn | γινώσκων | pres act ptcp nom sg masc) God listens to us, but whoever is not from God does not listen to us. By this we know (ginōskomen | γινώσκομεν | pres act ind 1 pl) the Spirit of truth and the spirit of error.
Reference
1 John 4:6
Sequence
194