Luther was right: the root behind all other manifestations of sin is compulsive unbelief—our voluntary darkness concerning God, ourselves, his relationship to the fall world and his redemptive purpose. For this reason the entrance and growth of new spiritual life involves the shattering of our sphere of darkness by repentant faith in redemptive truth. If the Fall occurred through the embracing of lies, the recovery process of salvation must center on faith truth, reversing this condition. Therefore Jesus says to those are trapped in unconscious slavery to sin, “If you continue In my word, you are truly my disciples, and you will in the truth, and the truth will make you free” (Jn. 8:31-8:32). The deliverance which brings us into spiritual life in communion with God is summed up in John’s description of redeemed behavior as withdrawing from darkness and walking in the light of truth and holiness.
Quoted from Lovelace, R. F. (1979). Dynamics of spiritual life: An evangelical theology of renewal . Downers Grove, Ill: Inter-Varsity Press, pp. 91-92.