Because of your partnership in the gospel from the first day until now be confident of this, that He who began a good work in you will carry it on to completion until the day of Christ Jesus. Philippians 1:6

Not only that, but we also rejoice in our sufferings, because we know that suffering produces perseverance; perseverance, character; and character, hope. And hope does not disappoint us, because God has poured out His love into our hearts through the Holy Spirit, whom He has given us. Romans 5:3-5