## many deceivers ##

This could be translated "many false teachers" or "many imposters"

## for many deceivers have gone out into the world ##

This could be translated "many false teachers have left the congregation."

## Jesus Christ came in the flesh ##

This is a metonymy that means "Jesus Christ came as a real human" (See: [[rc://en/ta/man/translate/figs-metonymy]])

## This is the deceiver and the antichrist" ##

This could be translated "they are the ones who deceive others and oppose Christ himself"

## Look to yourselves ##

"Watch out" or "Pay attention"

## lose the thing ##

This could be translated "lose your future rewards in heaven"

## full reward ##

This could be translated "complete reward in heaven"