I find during those inevitable low points that come, that I'm tempted to give up "good" ground gained when all seemed well in the sense of following on with the Lord. For me the key is whether or not I'm going on with the Lord. The arrows sent my way by the evil one, often challenge the good I see in my following of Jesus, even while at the same time knowing I've not (and never will in this life) arrive.
The point in this post: Don't go back. As Ben Witherington points out in the commentary I'm reading, the posture of the Christian in the spiritual warfare passage of Ephesians 6 is one of resistance and of standing in defending one's ground. This will involve struggle as the passage plainly says, and it certainly is not a kind of push button strategy to take care of the problem. We must be engaged- in the strength and armor of the Lord, with prayers.
So, don't go back. When you are in the darkness, don't abandon what God has revealed to you in the light. Or abandon the freedom God has given you in the light (I heard this said in the past, by Chuck Swindoll). And hang in there in the dark valleys. Hopefully I can learn to negotiate such valleys better, though I think I've come a long way in doing so over the years.
What would you like to share on this that can help us, or any thoughts about this?