Then spake Jesus again unto them, saying, I am the light of the world: he that followeth me shall not walk in darkness, but shall have the light of life. (John 8:12, KJV)
Walking or living under the influence of darkness leads to death. When sin is finished, it brings forth death. Death does not mean that you are not going to exist any more, it means everlasting torment.
We as believers should have control over ourselves and spirit. God has given us strength and a will to carry on through this life unto the next life and the new world that is to come. Therefore, walk in the light and don’t be influenced by darkness.