don't drive faster than your guardian angel can fly
Drive your vehicle at a safe speed.
Don't drive faster than your guardian angel can fly is one of my favourite proverbs directed at drivers.
ADJ
self-appointed
He acts as a self-appointed guardian of our neighborhood's safety, watching for any suspicious activity.
moral
VERB + GUARDIAN
act as
My older sister acts as my guardian while our parents are working abroad.
ADJ
legal
VERB + GUARDIAN
appoint, appoint sb (as)
When the parents died, the judge appointed her as guardian of the two young children.
act as