How do we know Hardshellism is true?

The validity of Hardshellism is rooted in its adherence to the doctrine of Scripture concerning God's sovereignty and the nature of Christ's atonement. The position maintains that Christ's sacrifice was intentionally for His elect, as evidenced in passages declaring the specific purpose of His mission to save 'His people' from their sins (Matthew 1:21). Furthermore, Hardshellism opposes doctrines that suggest a universal atonement that lacks the efficacy to secure salvation, arguing instead that such beliefs undermine God's justice and grace. The unwavering scriptural commitment is what reinforces Hardshellism's claim to truth in the face of competing theological perspectives.