Bible Commentary
1 The inspired writer calls us to render thanks to God for His goodness and mercy to man. Let us thank him that we have seen, proved, and tasted that he is good. God’s mercy or love is eternal.²
2 Assuming that the deities of the heathen were gods, yet none of them could be compared with our Elohim, who is infinitely beyond what they are fabled to be. If the heathen cultivate the worship of their gods with zeal, how much more intently should we seek the glory of the God of gods--the only true and real God.²
3 There are lords many, but Jehovah is the Lord of them. He is more lordly than all emperors and kings condensed into one. For this we may well be thankful, for we know the superior Sovereign will rectify the abuses of the underlings who now lord it over mankind. He will call these lords to his bar, and reckon with them for every oppression and injustice.²
4 God is the unrivalled miracle worker. Only a Being of infinite intelligence could have designed the universe with its indescribable wonders.³
5 What wisdom lies hidden in the secrets of the universe God has made! Scientific discoveries continually reveal more and more of the marvels of His creation. Design is seen in every department of nature.³
6 By His strength God sets fast the mountains and consolidates the habitable land upon which we sojourn, so that no deluge drowns the race. Who but the Lord could have wrought this marvel?²
7 What could men have done without light? Though they had the heavens above them, and dry land to move upon, yet what could they see, and where could they go without light? In great mercy God concentrated light upon two grand luminaries, the sun and moon.²
8 The influences of the sun are too many for us to enumerate them all, but untold benefits come to all orders of beings by its light, warmth, and other operations. Whenever we sit in the sunshine, our gratitude should be kindled.²
9 No hour of the day is left without rule. When we look up to the sky at night and see the lamps of heaven, we are reminded of God’s great love to us. The moon gladdens the heart, and the twinkling stars seem to speak messages of comfort.³
10 The final plague by which the Egyptians were smitten in their firstborn resulted in the deliverance of Israel from their oppressors. Their exodus from Egypt led to the creation of God’s favoured nation.²
11 Pharaoh and his slave masters were determined not to let the children of Israel go from their servitude in Egypt. However, when the Lord plans and promises to release His people and His people cooperate, there is no power in earth or hell that can withstand Him. When the proud monarch defies Him and refuses to cooperate he does so to his own destruction.³
12 In the Exodus the great power and glory of Jehovah were seen. He dashed in pieces the enemy with his right hand. He led forth his people in no mean or clandestine manner. "He brought them forth also with silver and gold, and there was not one feeble person in all their tribes."²
13 The Lord made a road across the sea bottom, causing the divided waters to stand like walls on either side. He who causes the waters of the sea ordinarily to remain as one mass can with equal readiness divide them.²
14 The Lord gave the people courage to follow the predestined track through the yawning abyss, which might well have terrified a veteran host. He led them down into the deep and up again on the further shore in perfect order, keeping their enemies back by the thick darkness of the cloudy pillar.²
15 The enemy in his fury drove after Israel into the sea, but his wrath found a terrible recompense beneath the waves. The chariots were thrown over, the horses were overthrown. Broken was the power and conquered was the pride of Egypt. Jehovah had vanquished the enemy.²
16 Throughout the wilderness journeying the Lord was the Provider and Leader of His people. He guided Israel by the pillar of fire by night and the cloud by day. He provided them with water and sent food from heaven to them. For forty years their feet did not swell, neither did their garments wax old in all the journey.^2,3
17 Within sight of their inheritance Israel had to face powerful enemies, kings judged to be great. However He who had subdued the really mighty ruler of Egypt made short work of these petty sovereigns, great though they were in the esteem of neighbouring princes.²
18 What good was their fame to them? As they opposed God they became infamous rather than famous.  Their deaths made the Lord's fame to increase among the nations while their fame ended in disgraceful defeat.²
19 Sihon smote Moab, but he could not smite Israel, for the Lord smote him. He was valiant and powerful, so as to be both great and famous; but as he wilfully refused to give a peaceful passage to the Israelites, and fought against them in malice, there was no choice for it but to let him run into that destruction which he courted. His fall was speedy and final, and the chosen people were so struck with it that they sung of his overthrow in their national songs.²
20 When the Lord's people were called upon to fight against Og king of Bashan, of the race of the giants, it was God who won the victory. Og had to exchange his bedstead of iron for a bed in the dust, for he fell on the battle field.²
21 The land of Canaan did not become the property of the Israelites by their own sword and bow, but was given by a grant from God. He had promised to Abraham that his seed would inherit this country.²
22 The lands of the heathen kings were given to Israel, and subdivided into lots such that every family had a plot of ground for cultivation. The laws by which the portions of ground were reserved to the owners and their descendants for a perpetual inheritance were fit subjects for song.²
23 Israel was brought unto a low estate of bondage and slavery in Egypt, but the Lord did not forget them in their distress. To all who have fallen low in sorrow, in sickness, or in sin, how comforting it is to know that the Lord does not forget, but sends help and deliverance.³
24 Israel's enemies brought the people low; but the Lord intervened, and turned the tables by a great redemption. The expression implies that they had become like slaves, and were not set free without price and power; for they needed to be "redeemed."²
25 The universal goodness of God in feeding all his creatures is as worthy of praise as his special favours to the elect nation. Because the Lord feeds all life therefore we expect him to take special care of his own family.²
26 The Lord is God in the highest realms, and among celestial beings. His throne is set in glory, above all, and out of reach of foes. He who feeds ravens and sparrows is yet the glorious God of the highest realms. Angels count it their glory to proclaim his glory in every heavenly street. ²
 

References and notes
1.  King James Authorized Version
2.  Charles H. Spurgeon, "The Treasury of David" - http://bible.crosswalk.com/Commentaries
3.  SDA Bible Commentary Vol. 3 pgs. 861-862
4.  Charles H. Spurgeon, "The Treasury of David" quoting John Gill - http://bible.crosswalk.com/Commentaries
5.  Living Word Bible Church - Five Books of Psalms - http://www.lwbc.co.uk/5_books_of_psalms.htm
6.  Easton Bible Dictionary - www.hyperdictionary.com/dictionary/David