Surely, LORD, you bless the righteous;
you surround them with your favor as with a shield.
There is the shield imagery again. In the middle east at this time the Israelites were very, very familiar with warfare. God's protection is often described as being like a shield. The epitome of defense and protection. Without your shield you were vulnerable, open for more wounding. Throughout the Psalms there is a clear distinction between the righteous and the wicked. There is much comfort for the former. God's gracious kindness surrounds those like a shield, all encompassing.