17 Therefore, dear friends, because you* know this beforehand, guard yourselves so that you do not lose your own safe position because you* have been led away by the error of lawless persons. 18 But grow in the grace and knowledge of our Lord and Savior Jesus Christ. To him be the glory, both now and to the day of eternity. Amen.
Here “because” is supplied as a component of the participle (“know beforehand”) which is understood as causal
Here “because” is supplied as a component of the participle (“have been led away”) which is understood as causal