a cat in gloves catches no mice
One might have to incorporate blunt or aggressive action in order to obtain results that cannot be achieved with passivity or restraint. I think you'll get that promotion if you pursue it more assertively. A cat in gloves catches no mice, after all.
cat in gloves catches no mice
Prov. Sometimes you cannot get what you want by being careful and polite. Jill: I've hinted to Mary several times that I need her to pay me the money she owes, but she just ignores me. Jane: A cat in gloves catches no mice, Jill. Tell her bluntly that you need the money.