You make springs gush forth in valleys, they flow between hills. (10)
Here we have epic demonstrative poetry, the poet overcome by the glory and power of the creation — and the Creator. The author’s feelings are quite infectious:
You are clothed with honour and majesty, wrapped in light as with a garment. You stretch out the heavens like a tent, you set the beams of your chambers on the waters, you make the clouds your chariot, you ride on the wings of the wind, you make the winds your messengers, fire and flame your ministers. (2-4)

The song continues relishing the diversity and complexity of creatures and the environment. As in several other psalms (145 for example) divine love also sustains and provides for this diverse living planet.
For more on this psalm, see the main page, Psalm 104: Sustainable creation.
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Together in Song supports the refreshing conservationist theme in TiS 65 with the refrain from verse 24:
Send forth your Spirit O God and renew the face of the earth.
At Woden Valley we diverge from the RCL to highlight widespread concern at the fate of the poor and needy. Several psalms include either assurance or prayers that divine love and care will favour those at risk, and that the associated moral standards will guide those in power towards equity.
What better refrain than the traditional Paraguayan song as taught by the late Argentinian and world musician Pablo Sosa and arranged by John Bell, On the poor show your mercy O God. This swinging little tune appears in Psalms for All Seasons Psalm 9, referring to its verse 18:
Selected verses paraphrased from Psalm 41 follow.