“Only When It Breaks!”

There is a story about a monastery in  Europe perched high on a cliff several hundred feet in the air.

The only way to  reach the monastery was to be suspended in a basket which was pulled to the top  by several monks who pulled and tugged
with all their strength.

Obviously the  ride up the steep cliff in that basket was terrifying.

One tourist got  exceedingly nervous about half-way up
as he noticed that the rope by which he  was suspended
was old and frayed.

With a trembling voice he asked the monk who was riding with him
in the basket how often they changed the rope.

The  monk thought for a moment and answered brusquely,
"Whenever it breaks."