Isaac's servants dug in the valley and found a well of fresh spring water there.
Bereishit 26:19
Although digging wells certainly served to further the advance of civilization wherever they were dug, they more importantly exemplified Isaac's message to the world. As opposed to filling a pit with water brought from elsewhere, digging a well reveals an already-existing source of water concealed beneath layers of earth. Thus, whereas Abraham's message to the world was: "Let me revive you with the refreshing water of Divine consciousness," Isaac's message was: "Now that you have been revived, look for your inner source of water. Dig away all the dirt encumbering your life, and you will reveal within yourself a wellspring of Divine awareness. This awareness will quench your spiritual thirst throughout your whole life."
Isaac's well-digging teaches us that our flashes of insight or inspiration must be followed up with self-improvement and self-refinement in order for them to make lasting changes.
From Kehot's
Daily Wisdom #1