Nehemiah wasn鈥檛 able to just clean things up and then have everything go smoothly from then on. He needed to continually challenge the people and right wrongs.
Our relationship with Jesus will never be something that doesn鈥檛 require an ongoing commitment on our part. We discover new sins in ourselves we didn鈥檛 know about, slowly slide back into bad habits, and find attitudes that need to be surrendered to God. Your reading of the Bible today is part of that commitment. Keep up the good work!