We can't change the past and the future is unknown, it is useless to cogitate and worry about these things. The devil wants us to regret past sins and worry about what will come in the future because it keeps us off our game in this walk with Christ.
We learn from the past but we do not have to act as though it is still with us. We have confidence in the future because Christ holds it for us.
Isaiah 40:29 "He gives power to the weak, And to those who have no might He increases strength.
Deuteronomy 31:8 "It is the Lord who goes before you. He will be with you; he will not leave you or forsake you. Do not fear or be dismayed.”
Joshua 1:9 "Have I not commanded you? Be strong and courageous. Do not be afraid; do not be discouraged, for the Lord your God will be with you wherever you go.”
Exodus 14:14 "The Lord will fight for you, and you have only to be silent.”
Our hope is not in anything in this world, it is in the life God has waiting for us when we pass from the world into eternity with Him.