R. Isaac said: It was only necessary to write the Torah from the words (in Exod. 12:2): THIS MONTH SHALL BE FOR YOU. Why did he write from the words (in Gen. 1:1): IN THE BEGINNING? To make known his mighty power. Thus it is stated (in Ps. 111:6): HE HAS DECLARED TO HIS PEOPLE THE POWER OF HIS WORKS IN GIVING THEM THE HERITAGE OF THE GENTILES.