We all are human. We want to fall back into our lazy ways not pursuing after Christ and His righteousness. It's hard work! We may even think we can float for a little bit in the middle- not pushing the "good Christian" thing very hard- and not living in out right sin and rebellion.
But because we are human, if we aren't pursuing after righteousness we are automatically falling away from Christ. It is only by His power we stay connected and want to lean more into our walk with Him.