A doctor once told me:

A foot is better than two-faces. With a foot you can stand. But two-faces, should never be your brand. Two feet you have, make good footing.

And another doctor said in a diabetes information seminar:

We must look after our feet more that our face. It is better to lose face than to lose your feet (because of diabetes, wounds at feet may not heal and many times a whole leg has to be amputated)

NB. to 'lose face' in English is much the same meaning as เสียหน้า in Thai ;-)