What a wonderful promise, God always finishes what He starts.And I am sure of this, that He who began a good work in you will bring it to completion at the day of Jesus Christ.
How does this apply to a marriage? We are not done yet! Paul says that our "completion" will be realized on, "The day of Jesus Christ." This means that I am not a finished product, nor is my wife. We are a work in progress.
We need to realize that the Lord is not done with us yet. All of us have room to grow, we are becoming more and more like Jesus as we continue to walk with Him. But in no way are we a finished product.
In marriage, we go a long way if we can simply give each other a break once in a while. Show some grace and forgiveness and patience towards each other. Allow the Lord to continue to do His thing in our spouse. Avoid making judgments; avoid being judgmental toward each other realizing that I am not a finished work either.