Article 1 IN THE OLD TESTAMENT

From The Catechism of the Catholic Church

2572
As a final stage in the purification of his faith, Abraham, “who had
received the promises,”¹³ is asked to sacrifice the son God had
given him. Abraham’s faith does not weaken (“God himself will provide the lamb
for a burnt offering.”), for he “considered that God was able to
raise men even from the dead.”¹⁴ and so the father of believers is
conformed to the likeness of the Father who will not spare his own Son but wiLl
deliver him up for us all.¹⁵ Prayer restores man to God’s likeness and
enables him to share in the power of God’s love that saves the
multitude.¹⁶