1. When the Lord will reveal His kingship, the earth will exult; the multitudes of islands will rejoice.
2. Clouds and dense darkness will surround Him; justice and mercy will be the foundation of His throne.
3. Fire will go before Him and consume His foes all around.
4. His lightnings will illuminate the world; the earth will see and tremble.
5. The mountains will melt like wax before the Lord, before the Master of all the earth.

Tehillim Ohel Yoseph Yitzchok (Kehot Publication Society)

Tehillim is recited by Jewish people collectively and individually, as the desire occurs to offer praise and thanksgiving to G-d; or alternitavely, in times of crisis and need, as a form of supplication, and even as a venue to express regret for sin.

6. The heavens will declare His justice, and all the nations will behold His glory.
7. All who worship graven images, who take pride in idols, will be ashamed; all idol worshippers will prostrate themselves before Him.
8. Zion will hear and rejoice, the towns of Judah will exult, because of Your judgments, O Lord.
9. For You, Lord, transcend all the earth; You are exceedingly exalted above all the supernal beings.
10. You who love the Lord, hate evil; He watches over the souls of His pious ones, He saves them from the hand of the wicked.
11. Light is sown for the righteous, and joy for the upright in heart.
12. Rejoice in the Lord, you righteous, and extol His holy Name.