“Peace I leave with you; my peace I give you. I do not give to you as the world gives. Do not let your hearts be troubled and do not be afraid.”
-John 14:27

“I can do all things through Christ who strengthens me.”
-Philippians 4:13

Therefore, if anyone is in Christ, he is a new creature; and the old things have passed away. Behold new things have come.
But all these things are from God, who reconciled us to himself through Christ and gave us the ministry of reconciliation.
That is, that God was in Christ himself, not counting people's sins against them. And he has committed to us the message of reconciliation.
So we are ambassadors for Christ, as though God were making his appeal through us;
We plead with you on behalf of Christ to be reconciled to God.
He made Christ who knew no sin to be sin on our behalf, so that in him we would become the righteousness of God.
-2 Corinthians 5:17-21