As a result of the Fall, conflict arose between our mind and body. To control us, Satan uses our body as his stronghold. He has turned us away from our original nature and spiritual nature and toward the attempts to satisfy our selfish and individualistic desires. The only path to escape from Satan’s dominion lies within God’s lineage of true love.
In other words, you have the responsibility to mature your spirit within your physical body based on the finite life you live in the tangible, physical world. This does not mean, however, that the maturing of a spirit self happens automatically. Your spirit self fully matures only on the basis of complete unity between your mind and body during your earthly life, which you achieve by expressing true love through actions.
We must meet the True Parents, and achieve mind-body oneness and unity of thought by learning from them how to practice true love and how to live a life for the sake of others.
Some people try to grow spiritually, develop their own spititual life and reach God through meditation, self-discipline, etc. This is very stupid. The one who goes to God fastest and achives the closest position is the one who loves others and witnesses to them in order to bring them to God. You can grow much faster snd develop much mor quickly. Don't just meditate for you own spirit. You may draw some spirits, but not God. No matter how much you pray, it doesn't do much good if you are only centered upon yourself. Allways love others.