99:1 A psalm of praise.
99:2 Sing joyfully to God, all the earth: serve ye the Lord with gladness. Come in before his presence with exceeding great joy.
99:3 Know ye that the Lord he is God: he made us, and not we ourselves. We are his people and the sheep of his pasture.
99:4 Go ye into his gates with praise, into his courts with hymns: and give glory to him. Praise ye his name:
99:5 For the Lord is sweet, his mercy endureth for ever, and his truth to generation and generation.
The verse centers on "mercy", "sheep", "psalm", "praise", "sing", "joyfully", "earth", and "serve". It is saying that the verse draws attention to "mercy" and "sheep", so its meaning should be read from those terms before moving to application.
The local DRB text gives this verse as the immediate unit, so "mercy" and "sheep" carries the first interpretive weight. In Psalms context, the local focus is worship, trust, the LORD's kingship, and covenant mercy.
A plain takeaway is to answer the verse's own emphasis on "mercy" and "sheep" with trust shaped by these words, not by a vague optimism outside the passage.