Out of this nettle

I live in Phoenix, Arizona. So the picture isn’t of English stinging nettles, but the top of a big prickly saguaro cactus. However, Shakespeare’s line from 1591 still rings true today:

“’Tis dangerous to take a cold, to sleep, to drink; but I tell you, my lord fool, out of this nettle, danger, we pluck this flower, safety.”