Verse 21.— Keep yourselves in the love of God. Constantly keeping before our minds what we owe as a duty to God for his wondrous mercy and love to us, we will do cheerfully, willingly and gladly what he requires of us, and thus we show our love to him and keep ourselves in his love by this course. While so doing, we are constantly keep­ing in mind that mercy which will eventuate in the greatest of all rewards— eternal life, which was made possible of attainment by our blessed Master.