What are your thoughts about a fat doctor?

Physician, heal thyself
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What's the meaning of the phrase 'Physician heal thyself'?
Attend to one's own faults, in preference to pointing out the faults of others.

The phrase alludes to the readiness and ability of physicians to heal sickness in others while sometimes not being able or willing to heal themselves. This suggests something of 'the cobbler always wears the worst shoes', that is, cobblers are too poor and busy to attend to their own footwear. It also suggests that physicians, while often being able to help the sick, cannot always do so and, when sick themselves, are no better placed than anyone else.