At Christmastime, Christians all around the world rejoice in Jesus’ birth. His coming, explains Alistair Begg, fulfilled God’s promise to Abraham and Sarah that through their seed all the nations of the earth would be blessed. When Abraham heard God’s word, he laughed and questioned God’s plan—but nothing is too hard for the Lord! Sarah conceived by God’s power and bore a son, yet this child was still not the promised Messiah. God Himself would provide the Lamb of salvation: His Son, Jesus.