There is a difference in ignorance and unbelief. Ignorance is a lack of knowledge. As harsh as it may sound, we all suffer from a degree of ignorance because we are not all knowing – only God is all knowing. However, unbelief is the lack of confidence in God. Unbelief is the lack of faith in His Word. Knowledge we can gain through prayer and reading the Bible but is completely void if we do not believe the Word of God is true. Rest assured Satan knows and believes the Word of God; he even quoted it back to Jesus trying to tempt Him in the wilderness (Matt 4:6). Faith only works at the point of execution, until then it is knowledge. The spiritual level of a person is not determined by our knowledge but by our faith in the Word of God. Knowledge of God’s Word is the basis of Christianity but Faith is the key to our Salvation.