All true, one has to let go of the past, accept the present and work towards the future to achieve things in life.. It's like, accepting you offended someone, you apologized and now you guys are back to being friends..

The mind has to be reprogrammed to teachings and word of God i.e the Bible if we seek to be free, transformed and complete in Christ
well detailed.our mind is important to Christ,God asks that you be a participant in your own salvation by renewing your mind and being one with him.