Lamentations 3:17-20 English Standard Version
17 my soul is bereft of peace; I have forgotten what happiness[good] is;
18 so I say, “My endurance has perished; so has my hope from the Lord.”
19 Remember my affliction and my wanderings, the wormwood and the gall!
20 My soul continually remembers it and is bowed down within me.
The bible does not directly address the subconscious. This is as close as I could come to addressing the issue here. We remember the events of the past and the emotions related to those events. What is not addressed here is the truth of those moments, only the deep seated emotions expressed in a way that the author fails to escape from and falls victim to them.
The subconscious has a powerful affect over our lives and if we fail to expose those memories to the truth, we will constantly misapply our actions based on vanity, emptiness as to results. We will not achieve the growth in Christ we have been promised.
We can see in verses 17 and 18 above the negativity of falling victim to an unhealthy subconscious. The only way to correct that condition is to expose the subconscious to the truth discovered and believed by the conscious mind. It is part of the renewed mind that needs to go deeper than conscious thought.
This relationship with truth is the purview of the Holy Spirit. What we have to do in order to correct the unforeseen errors of the subconscious mind is to accept that our perceptions are flawed and that we do not have to be controled by a past we cannot change.
We all have something that seems to linger from our past that haunts our present. For some it might be abuse at the hand of another. Perhaps a strong emotional response was felt during the formative years when emotions ruled over judgment. Some picture things and anything that looks even remotely similar to the original event triggers heightened emotions. We might even feel helpless to control those moments. The truth can replace those vanities.
We can overcome ourselves.