The Devils also believe, and tremble. Acknowledging that existence does not make one a Christian or qualify him for Heaven.
Faith is more than acknowledgment of a fact.
The New Testament book of Romans gives a concise summary of a person's condition and of what Christ offers him. Every person is a sinner. F or all have sinned and come short of the glory of God. Unforgiven sinners face the death penalty with eternal separation from God. Christ took the death penalty for all.