The light of the Savior, Jesus Christ, comes with all people when they are born into this world. It gently beckons to more light and truth. As you act in accordance with this light and truth, it will guide you into more light. Through the atonement of Jesus Christ, and by following His words as revealed through His prophets and apostles, the Lord can cleanse and purify us and lead us to all truth.
Sometimes we lack the faith to help this along, by working only toward what we think we need or want and not trusting that He will stay with us, heal us when hurt, and cleanse us from our sins. Like a little child, who is afraid of the pain required to pull out a sliver, we too resist having sins and impurities pulled from our souls, because there is a certain amount of discomfort and even pain required. If we trust Him, however, the pain will go away, and we will be left happier. He understands the hurt and is patient with us. As long as we continue to strive to improve, talking with Heavenly Father in prayer, feasting on His words in the scriptures and General Conference, He will gradually change and purify our hearts, that we no longer desire evil and gain control over both our spirits and bodies.
I bear testimony that He is really there. He did overcome all. He loves us, knows us individually, and works to bring us back, if we will have the faith, or even the desire to have faith in Him. He is more powerful than all the evil in the world. He knows and provides the way. Usually the only way to fully come to appreciate this is through experiencing difficult times and pain, physical or spiritual. Don't let that cause you to let go of Him. He knows what you specifically need and will provide only what you are capable of experiencing. He, like His and our Father in Heaven, is the kind of person I want to be with and become like. His only desire, which is the will of the Father, is to bring us back to our Father in Heaven. I want to be cleansed by Him and purified by Him, so that I finally want only what is good and right, and I have gained the strength to always act accordingly. This is my testimony of Him, that I share in the name of Jesus Christ, amen.