Psalm 18 (19)
For the End; a psalm by David.

The heavens declare the glory of God;
The firmament shows the creation of
His hands.
Day to day utters speech,
And night to night reveals knowledge.
There is no speech nor language
Where their voices are not heard.
Their proclamation went forth into all
The earth,
And their words to the ends of the
World.
In the sun He set His tabernacle;
And it rejoices exceedingly
Like a bridegroom coming forth from
His bridal chamber,
Like a strong man to run a race.
Its rising is from one end of heaven,
And its circuit runs to the other end;
And nothing shall be hidden from its heat.
The law of the Lord is blameless,
Converting souls;
The testimony of the Lord is
Trustworthy, making children wise;
The ordinances of the Lord are right,
Rejoicing the heart;
The commandment of the Lord is
Bright, enlightening the eyes;
The fear of the Lord is pure, enduring
Unto ages of ages;
The judgments of the Lord are true,
Being altogether just.
More to be desired are they than gold
And a very precious stone,
Sweeter also than honey and the
Honeycomb.
For indeed Your servant keeps them;
In keeping them there is great reward.
Who will understand his
Transgressions?
Cleanse me from hidden sins,
And spare your servant from
Unnatural sins;
If they have no dominion over me,
Then I shall be blameless,
And I shall be cleansed from great sin.
Let the words of my mouth and the
Meditation of my heart
Be always pleasing before You,
O Lord, my helper and my redeemer.

Commentary from the Orthodox Study Bible

Ps 18 reveals God the Word becoming Man in the womb of the most holy Mother of God. For on His Nativity, all creation bore witness to the glory of God revealed in His Incarnation. And in His birth from the womb of the Virgin, He was likened to the sun rising from the east, to a bridegroom coming from his chamber , and to a strong man ready to run a race, to bring salvation to the world.
Versus 2, 3 are sung as the Alleluia before the Gospel reading in the Divine Liturgy on Nativity. And v. 6 is sung in the second canon of canticle five during Orthros for the Feast of the Nativity of the Mother of God.

Comments

I just felt so encouraged by these verses:
Let the words of my mouth and the
Meditation of my heart
Be always pleasing before You,
O Lord, my helper and my redeemer.

Let my words and what I choose to focus on be pleasing to you, God. Cleanse me from my sin, Lord. Thank you for being our helper and our redeemer, Jesus. You are so good to me, Lord. Hear my cries and let my words and my thoughts be pure, my helper and redeemer!