Thou coveredst it with the deep as with a garment - Compare the notes at Job 38:9. The meaning is, that God covered the earth with the sea - the waters - the abyss - as if a garment had been spread over it. The reference is to Genesis 1:2; where, in the account of the work of creation, what is there called "the deep" - the abyss - (the same Hebrew word as here - תהום tehôm - covered the earth, or was what "appeared," or was manifest, before the waters were collected into seas, and the dry land was seen.

The waters stood above the mountains - Above what are now the mountains. As yet no dry land appeared. It seemed to be one wide waste of waters. This does not refer to the Deluge, but to the appearance of the earth at the time of the creation, before the gathering of the waters into seas and oceans, Genesis 1:9. At that stage in the work, all that appeared was a wide waste of waters.

Thou coveredst it with the deep - This seems to be spoken in allusion to the creation of the earth, when it was without form and void, and darkness was upon the face of the deep, and the waters invested the whole, till God separated the dry land from them; thus forming the seas and the terraqueous globe.

The poet Ovid has nearly the same idea: -

Densior his tellus, elementaque grandia traxit,

Et pressa est gravitate sua; circumfluus humor

Ultima possedit, solidumque coercuit orbem.

Met. lib. i., ver. 29.

Earth sinks beneath, and draws a numerous throng

Of ponderous, thick, unwieldy seeds along:

About her coasts unruly waters roar;

And, rising on a ridge, insult the shore.

Dryden.

Thou coverest it with the deep as with a garment,.... This refers not to the waters of the flood, when the earth was covered with them, even the tops of the highest mountains; but to the huge mass of waters, the abyss and depth of them, which lay upon the earth and covered it as a garment, at its first creation, as the context and the scope of it show; and which deep was covered with darkness, at which time the earth was without form, and void, Genesis 1:2 an emblem of the corrupt state of man by nature, destitute of the image of God, void and empty of all that is good, having an huge mass of sin and corruption on him, and being darkness itself; though this depth does not separate the elect of God, in this state, from his love; nor these aboundings of sin hinder the superaboundings of the grace of God; nor the operations of his Spirit; nor the communication of light unto them; nor the forming and renewing them, so as to become a curious piece of workmanship; even as the state of the original earth did not hinder the moving of the Spirit upon the waters that covered it, to the bringing of it into a beautiful form and order.

The waters stood above the mountains; from whence we learn the mountains were from the beginning of the creation; since they were when the depths of water covered the unformed chaos; and which depths were so very great as to reach above the highest mountains; an emblem of the universal corruption of human nature; the highest, the greatest men that ever were, comparable to mountains, have been involved in it, as David, Paul, and others.

Thou coveredst it with the {c} deep as with a garment: the {d} waters stood above the mountains.

(c) You make the sea to be an ornament to the earth.

(d) If by your power you did not bridle the rage of the waters, the whole world would be destroyed.

104:6 The deep - In the first creation, Gen 1:2,9.

6-9. These verses rather describe the wonders of the flood than the creation (Ge 7:19, 20; 2Pe 3:5, 6). God's method of arresting the flood and making its waters subside is poetically called a "rebuke" (Ps 76:6; Isa 50:2), and the process of the flood's subsiding by undulations among the hills and valleys is vividly described.

104:1-9 Every object we behold calls on us to bless and praise the Lord, who is great. His eternal power and Godhead are clearly shown by the things which he hath made. God is light, and in him is no darkness at all. The Lord Jesus, the Son of his love, is the Light of the world.