An empty bag will not stay up.
More Mexican Proverbs:
If it does not stink, it is not a foot.Mexican
Blood boils without flame.
Mexican
The heir's tears are but a mask to disguise his joy.
Mexican
Rocking chairs make long-tailed cats uneasy.
Mexican
There's no life so tiring as one of doing nothing.
Mexican
He who walks with wolves learns to howl.
Mexican