en_tn/jhn/03/14.md

as Moses lifted up the serpent

Not a real serpent. A made-up serpent; made of bronze - a type of metal.

in the wilderness

The wilderness is a dry, desert place, but here it refers specifically to the place where Moses and the Israelites walked around for 40 years.

As Moses lifted up the serpent in the wilderness, even so the Son of Man must be lifted up

(See: rc://en/ta/man/translate/figs-simile)