Imagine a world without wind. Lakes would be calm. Falling leaves wouldn’t blow in the streets. But in still air, who would expect trees to suddenly fall over? That’s what happened in a three-acre glass dome built in the Arizona desert. Trees growing inside a huge windless bubble called Biosphere 2 grew faster than normal until suddenly collapsing under their own weight. Project researchers eventually came up with an explanation. These trees needed wind stress to grow strong.

Jesus let His disciples experience gale-force winds to strengthen their faith (Mark 4:36–41). During a night crossing of familiar waters, a sudden storm proved too much even for these seasoned fishermen. Wind and waves were swamping their boat while an exhausted Jesus slept in the stern. In a panic they woke Him. Didn’t it bother their Teacher that they were about to die? What was He thinking? Then they began to find out. Jesus told the wind and waves to be quiet—and asked His friends why they still had no faith in Him.

If the wind had not blown, these disciples would never have asked, “Who is this? Even the winds and the waves obey him!” (Mark 4:41).

Today, life in a protective bubble might sound good. But how strong would our faith be if we couldn’t discover for ourselves His reassuring “be still” when the winds of circumstance howl?