Do you know when you were united to Christ? Your personal union with Christ is required for your salvation. Without it, you will not be found “in Him.”
In Romans 6:3-4 Paul expressly identifies baptism (i.e. water immersion) as the point in time when you are “united with Christ.” Water baptism exemplifies the very real and actual death, burial, and resurrection of repentant believers performed by the Holy Spirit (i.e. Holy Spirit baptism or being born again).