If our sins are forgiven why can Christians still die because of their behavior?
Romans 6:23 New King James Version (NKJV)
All living created creatures die. (Enon is the exception.)
God will renew His creation one day.
I think you are asking is - Can Christians still die because of their behavior?
Yes Christians can die as martyrs.
Also Christians can die because of disobedience.
I will deal with how we can die in disobedience.
We are still growing in sanctification.
Much of sanctification is a choice.
We must choose to live the gospel life in worship, Word, prayer and action.
They both dropped dead as they lied to the Holy Spirit in withholding a pledge of property to the early church.