This Psalm consists of two distinct parts. The first part celebrates the revelation of the Power and Majesty of God in Nature, the universal and unceasing testimony of the heavens to their Creator (v. 1~6). The second part celebrates the moral beauty and beneficent power of The LORD's 'Law' in its manifold elements and aspects (v. 7~11); and the Psalmist, viewing his own life in the sight of this holy Law, concludes with a prayer for pardon, preservation, and acceptance (v. 12-14).
Now listen to the psalmist, "Let the words of my mouth, and the meditation of my heart, be acceptable in thy sight, O LORD, my strength, and my redeemer." Who was David's strength? Christ! Who was his redeemer? Christ. Christ is also our strength and our redeemer. He becomes that through the grace of God. What a wonderful psalm this is!
To the chief Musician, A Psalm of David. The heavens declare the glory of God; and the firmament sheweth his handywork.
Psalms 19:2
Day unto day uttereth speech, and night unto night sheweth knowledge.
Psalms 19:3
There is no speech nor language, where their voice is not heard.
Psalms 19:4
Their line is gone out through all the earth, and their words to the end of the world. In them hath he set a tabernacle for the sun,        Spurgeon    
Psalms 19:5
Which is as a bridegroom coming out of his chamber, and rejoiceth as a strong man to run a race.
Psalms 19:6
His going forth is from the end of the heaven, and his circuit unto the ends of it: and there is nothing hid from the heat thereof.
Psalms 19:7
The law of the LORD is perfect, converting the soul: the testimony of the LORD is sure, making wise the simple.
Psalms 19:8
The statutes of the LORD are right, rejoicing the heart: the commandment of the LORD is pure, enlightening the eyes.
Psalms 19:9
The fear of the LORD is clean, enduring for ever: the judgments of the LORD are true and righteous altogether.
Psalms 19:10
More to be desired are they than gold, yea, than much fine gold: sweeter also than honey and the honeycomb.
Psalms 19:11
Moreover by them is thy servant warned: and in keeping of them there is great reward.
Psalms 19:12
Who can understand his errors? cleanse thou me from secret faults.
Psalms 19:13
Keep back thy servant also from presumptuous sins; let them not have dominion over me: then shall I be upright, and I shall be innocent from the great transgression.
Psalms 19:14
Let the words of my mouth, and the meditation of my heart, be acceptable in thy sight, O LORD, my strength, and my redeemer.        Spurgeon