There is more mind in a madman than in you. Your mind is not so uncontrolled, not so vast, not so fast; it is ordinary, manageable. The madman is lost in immense, boundless thoughts, passions, dreams.
So that principle that 'losing one's mind is madness' is not true; it needs to be changed. Losing oneself in the mind is madness.
And if you understand this, then health is simply defined: come out of the mind into openness, into silence, where no thought, no desire will disturb you.
You are simply a pool of silence, without even a ripple – that is health.
Osho"