Jude is bringing some final advice about ‘these people’. He spots a common link amongst them all. Basically it can be summed up with this: listen carefully to these people and you will see their falseness because they are always speaking!
“These people are grumblers and faultfinders; they follow their own evil desires; they boast about themselves and flatter others for their own advantage.” (Jude v16)
Grumblers – listen to what comes out of their mouths. They are people who undermine other leaders.
Faultfinders – listen to what they are actually finding fault in. It can be the teaching from other preachers.
Follow evil desires – listen to what they are going to gain from what they are seeking.
Boast about themselves – listen to what they say about themselves and what they have done.
Flatter others for their advantage – listen to what they say of other people and if they stand to gain from the ones they praise.
We can spot a lot by just listening!
Missions Paul 