The pleasure the psalmist speaks of in Psalm 119:14-15 is not simply the mental exhilaration of study and discovery — the sort of thing many experience when they chance upon something previously unseen in the Bible, which I think is grossly overrated for Bible study. No, the pleasure of the psalmist is otherwise.
We sell ourselves short if we equate the “statutes” and “precepts” and “decrees” of these verses with the words on the page of the Bible. The psalmist finds these words to be communication from God, discovering these words as establishing relationship with God, and therefore the words as interpersonal communication.
In knowing them as communionn with God the psalmist exhilarates.
Notice the words of pleasure:
I rejoice in following your statutes
as one rejoices in great riches.
I meditate on your precepts
and consider your ways.
I delight in your decrees;
I will not neglect your word.
The psalmist rejoices (shis) and delights (sha’ashu’im) — as one does in great riches. Exhilaration.
This exhilaration transcends knowing as cognition; it is the absorption in Torah and being absorbed by Torah, it is delight in knowing and being known, it is delight in both knowing and doing.
I like how it begins in v. 14: “in” the way (derek) of your statutes — not just knowing but the knowing-doing in relationship with God; in the way of communing in in knowing-observing.