God or Your Kid?
The wonderful grace promise in this story is that God the "tester" is also God the "provider". In this way, this story is not just about Abraham being found faithful. It is also about God being found faithful to us always.
The same God who provided a sacrificial ram so that Isaac would live provided the ultimate sacrificial lamb, Jesus Christ. This is so that whoever believes in him will live forever in right relationship with God and with each other. The same God who invited us to put our trust and faith in the Lord Jesus Christ will test our trust and faith in various ways as we walk the path of life. But, as Paul tells us in I Corinthians 10:13 (NIV), 13 No temptation has overtaken you except what is common to mankind. And God is faithful; he will not let you be tempted beyond what you can bear. But when you are tempted, he will also provide a way out so that you can endure it.
As we are tested in this life to give our allegiance to something other than God -- whether that is our kid, money, job, status, position etc. -- God always provides the way for us to choose God. God enables us to pass the test and to choose God’s way.