We know that the human soul have these dimensions: the will, the mind (intellect) and the emotions. But there are 2 more dimensions that affect the soul - imagination and memory.
Imagination affects us positively if we centre it on Christ and His given dreams and plans for us but negatively if we centre it on the lies of the evil one. Imagination can build up our faith as we focus on the Lord who has promised the dreams but it can cripple us if we start to worry or be anxious on what is to come.
Imagination deals with the future while memory deals with the past. Good memories help build our faith in the Lord as we reflect and are reminded of His faithfulness and goodness to us in the past.
Bad memories hinder us if we get stuck by guilt and cannot move forward.
So let us bring our memories to the Lord for His forgiveness and cleansing and our imaginations to Him for sanctification and clarification so that we move forward in faith and obedience.