The Greek verb hallomai means to spring up, leap for joy, or bubble up like a spring of water. It describes both physical leaping and the dynamic upwelling of living water.
Hallomai appears in three remarkable contexts. In Acts 3:8, the man lame from birth began "jumping and leaping" after his healing — the body doing what it never could before. In Acts 14:10, Paul commands the lame man to stand, and he leaped and walked. Most profoundly, in John 4:14, Jesus promises living water that will "spring up" (hallomai) to eternal life. The same verb — leaping with joy, bubbling with life — describes what the Holy Spirit does in the heart of the believer.