This speaks of how difficult it is to understand the reasons for a person's actions by comparing it to the difficulty of reaching the water in a deep well. Alternate translation: "It is as difficult to understand the purpose in the human heart as it is to reach the water in a deep well" or "The purpose of in the human heart is very difficult to understand" (See: [[rc://en/ta/man/jit/figs-simile]])
This speaks of figuring out the purpose of the human heart as if it was water being drawn from a deep well. Alternate translation: "will cause the purpose to be known" or "will figure it out" (See: [[rc://en/ta/man/jit/figs-metaphor]])