Passage
Harden not your heart, as at Meribah, As in the day of Massah in the wilderness;
Harden not your heart, as at Meribah, As in the day of Massah in the wilderness;
Psalms 95:6 Oh come, let us worship and bow down; Let us kneel before Jehovah our Maker:
Psalms 95:7 For he is our God, And we are the people of his pasture, and the sheep of his hand. To-day, oh that ye would hear his voice!
Psalms 95:8 Harden not your heart, as at Meribah, As in the day of Massah in the wilderness;
Psalms 95:9 When your fathers tempted me, Proved me, and saw my work.
Psalms 95:10 Forty years long was I grieved with [that] generation, And said, It is a people that do err in their heart, And they have not known my ways:
The verse centers on "harden", "heart", "meribah", "massah", and "wilderness". It is saying that the verse draws attention to "harden" and "heart", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 7's "For he is our God And we..." into verse 9's "When your fathers tempted me Proved me...", so "harden" and "heart" belong inside that flow. 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 "harden" and "heart" with trust shaped by these words, not by a vague optimism outside the passage.