Those of any race who share Abraham's faith

Romans 4:17-25
The words “it was credited to him” were written not for him alone,  but also for us, to whom God will credit righteousness—for us who believe in him who raised Jesus our Lord from the dead.  He was delivered over to death for our sins and was raised to life for our justification.
Abraham stuck to his conviction that God would do what he promised.
The covenant-agreement, of which circumcision was the outward sign,came later. So God's people are not those of Abraham's race who lay claim to the covenant promises as their birthright but those of any race who share Abraham's faith.
Why?
Even Abraham was old and Sarah womb was old as dead, but God's power gave him life. Which faith were written not for him alone,  but also for us.
Jesus Chris is the hope to all who believes in Him. He was delivered over to death for our sins and was raised to life for our justification.
How?
Gospel is good news that Jesus Christ is the hope to all who living in the darkness.