Nothing has to be changed, because all is beautiful -- that is enlightenment. All is as it should be, everything is perfect. This is the most perfect world, this moment lacks nothing -- the experience of this is what enlightenment is.
"The greatest attribute of God is Love. The Tree of Life is located in the very depth of our soul. The most perfect and abundant fruit that grows and ripens is Life giving Love; it is the great healing force in the world. Love never fails to meet every demand of the human heart. The Divine principal of Love may be used to eliminate every sorrow, infirmity, in-harmony, ignorance and all mistakes of mankind. Love is God; eternal, limitless, changeless, infinite. It is the pulse of the world, the heartbeat of the Universe."
Source: Life and Teaching of the Masters of the Far East (6 Vol. Set)
The original sin is not that we are inherently flawed, born sinners, or imperfect; the original sin is that we do not recognize, realize that each of us is born perfect, exactly as the universe, God intended us to be. We are all perfect. The universe is perfect. Stop struggling against yourself. Accept that you are perfect. When you do, your highest self will shine through.