I saw a lovely, deep, clear pond. Someone was on the bank fishing. He was successful and caught a lot of wonderful things in the pond, but the person, though happy, doesn’t feel deeply contented. I see the pond beckoning the person to dive in- to submerge themselves in the cool, clear water.
I believe this is referring to the things of God. Someone has historically fished for good things in the deep reservoir of God’s truths. Recently he has been feeling God calling him to jump in and go deeper. It is scary as he has never seen anyone else do this and has never contemplated it himself. Follow the call of God, expose yourself to the wonderful, wild mysteries that are in the deep places of the holy unknown.