How do we know Jesus' sacrifice is for us?

Hebrews 2:9 explains that Jesus was made a little lower than the angels 'for the suffering of death,' and He tasted death for every man. This statement signifies His death's universal scope—He died not just for Jews but for all kinds of men, fulfilling the God's purpose of salvation. This doctrine of 'limited atonement' conveys that while Jesus’ sacrifice has an infinite value, its efficacy is applied specifically to the elect, those whom God has chosen to save. His resurrection guarantees the assurance of salvation for those who believe.