How do we know Christ's love for the church is particular and unconditional?

The love of Christ for His church is particular, meaning it extends specifically to the elect whom the Father has chosen. This love is not unconditional in the sense that it is arbitrary; rather, it is perfect and everlasting, conditioned upon the person and work of Jesus Christ. The assurance of His love is tied to His promise of salvation and the covenant of grace, where God says 'I will love them' as part of His plan. This particular love is profound as it guarantees that those who are in Christ can never lose this love, offering security and certainty in their relationship with Him (Romans 8:38-39).