6 The words of Yahveh are pure words, like silver refined in a clay furnace, purified seven times. 7 You, Yahveh, will guard us; you will protect us from this generation permanently.
God’s specific promise was to provide security for those who long for it. The psalmist responds to that promise by praising God for his pure words— words that can be trusted. His words are not like the “great” words of the hypocrites.
This generation is full of pretending exploiters. But God promises to protect us from their influence, give us permanent (for the age) security.