## everyone ##

This refers to all children of God.

##  overcomes the world ##

This can be translated “refuses to do the evil things unbelievers do”

## And this is the victory…our faith  ##

This could be translated "Our faith gives us the power to resist sinning against God."

## Who is he who overcomes the world?  ##

This is a rhetorical question which contains a metonymy (world). "He" refers to believers. (See: [[rc://en/ta/man/translate/figs-rquestion]] and [[rc://en/ta/man/translate/figs-metonymy]])