How to drop blocks instead of throwing them

Move the blocks to spell out METATRON when read vertically (down) with your head tilted to the right. Do this within view of the entrance, and rotate the view to the back to finish the puzzle.

Afterwards...

another red "heart" cube piece will appear. (image)

There is one room in particular that provides what you're looking for. You don't need to copy NPC dialog, though part of the fun is copying the other wall-writings for later consideration. So there is no single intended method (I imagine most people will look online)—your method could work, though it sounds frustrating.

Want a hint for that room's location?

It's off of the waterfall room.

Want an even bigger hint?

A pillar in the room links the code to an English pangram (sentence containing every letter of the alphabet).

And to give it away:

In the tree room above the waterfall, a fox jumps over a dog next to this pillar, which reads all the way around: "The quick brown fox jumps over the lazy dog." (image)