Charles H. Spurgeon on Psalms 149:1

Praise ye the LORD. Specially you, ye chosen people, whom he has made to be his saints. You have praised him aforetime, praise him yet again; yea, for ever praise him. With renewed zeal and fresh delight lift up your song unto Jehovah. Sing unto the LORD a new song. Sing, for it is the fittest method for expressing reverent praise. Sing a hymn newly composed, for you have now a new knowledge of God. He is ever new in his manifestations; his mercies are new every morning; his deliverances are new in every night of sorrow; let your gratitude and thanksgivings be new also. It is well to repeat the old; it is more useful to invent the new. Novelty goes well with heartiness. Our singing should be "unto the Lord"; the songs we sing should be of him and to him, "for of him, and to him, and through him are all things." Among our novelties there should be new songs: alas! men are fonder of making new complaints than new Psalms. Our new songs should be devised in Jehovah's honour; indeed all our newest thoughts should run towards him. Never can we find a nobler subject for a song than the Lord, nor one more full of fresh matter for a new song, nor one which we are personally so much bound to sing as a new song "unto the Lord." And his praise in the congregation of saints. Saints are precious, and a congregation of saints is a treasure house of jewels. God is in the midst of saints, and because of this we may well long to be among them. They are so full of his praise that we feel at home among them when we are ourselves full of praise. The sanctuary is the house of praise as well as the house of prayer. All saints praise God: they would not be saints if they did not. Their praise is sincere, suitable, seasonable, and acceptable. Personal praise is sweet unto God, but congregated praise has a multiplicity of sweetnesses in it. When holy ones meet, they adore The Holy One. Saints do not gather to amuse themselves with music, nor to extol one another, but to sing his praise whose saints they are. A congregation of saints is heaven upon earth: should not Jehovah, the Lord of saints, have all the praise that can come from such an assembly? Yet at times even saintly conclaves need to be stirred up to thanksgiving; for saints may be sad and apprehensive, and then their spirits require to be raised to a higher key, and stimulated to happier worship.