How do we know God's grace is extended to His people?

We understand that God's grace is extended to His people through the personal call of God, which the Holy Spirit applies to the hearts of the elect. Psalm 50 illustrates how God calls His people, conveying His desire to gather those whom He has chosen. This calling is not a mere invitation but a powerful effectual call that enables those chosen to respond in faith and come to Christ, recognizing their need for a Savior, demonstrating God's unwavering commitment to His grace toward His elect.