How do we know God's blessings are based on grace, not works?

The passage in Genesis 22 suggests that God's blessings to Abraham could be misconstrued as being contingent upon Abraham's obedience. However, the New Testament sheds light on this interpretation, particularly in Hebrews 6, which clarifies that God's promises are not founded on human actions but on His own character and purpose. As Romans 9:11 states, the purpose of God according to election stands independent of works. This points to a core principle in Reformed theology: salvation and God's favor are based solely on His sovereign grace, providing us reassurance that our acceptance by God does not depend on our compliance but on Christ's finished work on the cross.