Treat the small in the way you would want to be treated by the big.
More Spanish Proverbs:
I cried when I was born and as each day passes I know why.Spanish
The horseshoe that clatters wants a nail.
Spanish
The letter enters with blood.
Spanish
Three things are not to be trusted; a cow's horn, a dog's tooth, and a horse's hoof.
Spanish
By the street of "By-and-By" one arrives at the house of "Never."
Spanish
Sleep is the best cure for waking troubles.
Spanish