It is a testimony to His grace that theological consistency is not needed to merit salvation.
A man may be evidently of God’s chosen family, and yet though elected, may not believe in the doctrine of election. I hold there are many savingly called, who do not believe in effectual calling, and that there are a great many who persevere to the end, who do not believe the doctrine of final perseverance. We do hope that the hearts of many are a great deal better than their heads. We do not set their fallacies down to any willful opposition to the truth as it is in Jesus, but simply to an error in their judgments, which we pray God to correct. We hope that if they think us mistaken too, they will reciprocate the same Christian courtesy; and when we meet around the cross, we hope that we shall ever feel that we are one in Christ Jesus
- C.H. Spurgeon, "Effects of Sound Doctrine"