Trials should produce growth not meant to make us fall. You evaluate your actions, your mistakes, your sins. You repent, fast, and pray. You cry out to God. Blessed is the man who endures temptation; for when he has been proved, he will receive the crown of life which the Lord has promised to those who love Him
Our sins are our responsibility, and we bear them unless a substitute is provided to bear them for us, which Jesus Christ did. God will bring all those alive during the Millennium to salvation without Satan being around, even as He is perfecting the first fruits now with Satan around. God is sovereign, and thus neither limited by Satan's presence nor dependent on it.
Failure to count the cost of following Christ results in an incomplete life. "Holding fast to the word of life" is part of the solution for finishing one's life successfully. If we do not, we have no basis for faith. Our faith would be in ourselves, not in God.
As a faithful Levite, you were given Stewardship to tend and mend the Temple and its grounds. Despite how things look on the surface, our worldview is relatively narrow compared to God's.
God has called us to be merciful to those who are undesirable in Society’s eyes and guilty of sin in His (God's) Eyes—redeeming them from the death penalty and setting them on the path toward eternal life in the Kingdom of God.