A former next door neighbour of ours was a keen handyman and when he finished a job it was really well done. His problem was that he took ages to finish a job and often started others before completing the first one.
His poor wife had to bite her tongue as room after room showed signs of work being started and then abandoned for something more interesting, or more urgent.
God never leaves a job half done. If you have placed your faith in the Lord Jesus Christ as your Saviour, you can trust the Bible when it says, ‘be confident in this, that he who began a good work in you will carry it on to completion until the day of Christ Jesus.’
It may be that your faith has wavered; it may be that you have your doubts, but God never wavers and never fails to finish what he has begun. (see Philippians 1:6)