According to Dragonball what is manga by Toriyama Akira, Goku climbed to the tower of Babel for get mysterious water. Goku knew this water can make me powerful man. however he easily can't get it by taoist hermit with miraculous powers. so Goku tried fight with him for get a mysterious water. but he was too strong. finally Goku could get a water. but although drink it, Goku could't get a power. water was just water. Goku is already had a power during fight with him.
Often we used to find a clearly answer. on the other hand sometimes the process of finding can to be a answer. like a our life..