Psalm 16, with commentary by St. Peter

Therefore my heart is glad, and my soul rejoices,

My body also dwells secure,

For thou dost not give me up to Sheol,

Or let thy godly one see the Pit. (Psalm 16:9-10)

"Brethren, I may say to you confidently of the patriarch David that he both died and was buried, and his tomb is with us to this day. Being therefore a prophet...he foresaw and spoke of the resurrection of the Christ, that he was not abandoned to Hades, nor did his flesh see corruption. This Jesus God raised up, and of that we are all witnesses." (Acts 2:29-32)

Psalm 15

Lord, who may dwell in your tabernacle?

Who may abide upon your holy hill?

(Psalm 15:1)

"We recognize that we are the true and living temple of God. God dwells...above all in the soul which has been made according to the image of God and was formed by the hand of the Creator....Christians who are chaste, humble, temperate and kind...observe peace and charity, and do not give false testimony--in such men the temple of Christ is kept intact, and Christ is known to dwell in them....Those who lead a wicked life and observe neither chastity nor justice, receiving 'bribes against the innocent' (Psalm 15:5) will have to endure eternal punishments."--St. Caesarius of Arles, Sermon #229, "On the Blessing of a Church.''

St. Caesarius was a wise pastor. Lest you lose heart, he goes on to say, "For this reason, brethren, with God's help let us avoid serious sin. As for the small sins of which we cannot be free, resist them by daily almsgiving and redeem them by continuous prayer." There's always hope.

Psalm 14

The fool says in his heart, 'There is no God.' They are corrupt, they do abominable deeds....Have they no knowledge, all the evildoers who...do not call upon the Lord? There they shall be in great terror, for God is with the generation of the righteous. (Psalm 14:1, 4-5)
  The Latin Vulgate uses the term "voluntas" instead of "deeds." Voluntas also connotes will, choice, or desire. Therefore, their desires themselves had become abominable. Cassiodorus states, "Voluntas derives from volatus (flying), because the mind rushes where it wills with great speed." This etymology is a "fanciful notion," his translator says, but it doesn't prevent Cassiodorus from making a very accurate observation: an ignorant and corrupted conscience inevitably leads to "abominable deeds."

Cassiodorus continues: "So it was right that those who expelled from their minds the fear of the Lord, which is salutary in this world, were shaken with groundless trembling." That is, shaken at the Son's coming.

"The virtue preached to us in this psalm is that as far as we can we should with kindly hearts consult the interests of our enemies, so that they do not harden in blind obstinacy and be subject to ineluctable error. The Church rebukes a sinning people, urging them not to hasten to their own destruction; thus they can abandon their wickedness and cast off the vices which can cause them wholly to perish."