How are the blessed? The blessed are the ones who delight in the law of the Lord, for in keeping them there is great reward (Psalm 19:9-11). In other words, their source of joy is in fearing God and keeping his commandments (Ecclesiastes 12:13), which is the whole duty of man. Their delight is in “THE LIGHT” of the world, Jesus Christ, who will reward everyone, according as their work shall be (Revelation 22:12).

Points to ponder:
Who (not what) is your source of joy? Do yo delight in the law of the LORD? Do you delight in “THE LIGHT” of the world, Jesus Christ? 

Psalm 1:2 (KJV)
2 But his delight is in the law of the Lord; and in his law doth he meditate day and night.