How can I recognise a false teacher ?

Date: Sun 11:30 AM 2nd October 2022
Preacher: Rev. David McLaughlin
Bible Reference: Colossians 2:18

Let no man beguile you of your reward in a voluntary humility and worshipping of angels, intruding into those things which he hath not seen, vainly puffed up by his fleshly mind,