Manjusri declared, "Householder, it is as you say. Who comes, finally comes not. Who goes, finally goes not. Why? Who comes is not known to come. Who goes is not known to go. Who appears is finally not to be seen.
"Good sir, is your condition tolerable? Is it livable? Are your physical elements not disturbed? Is your sickness diminishing? Is it not increasing? The Buddha asks about you - if you have slight trouble, slight discomfort, slight sickness, if your distress is light, if you are cared for, strong, at ease, without self-reproach, and if you are living in touch with the supreme happiness.
"Householder, whence came this sickness of yours? How long will it continue? How does it stand? How can it be alleviated?"
Vimalakirti replied, "Manjusri, my sickness comes from ignorance and the thirst for existence and it will last as long as do the sicknesses of all living beings. Were all living beings to be free from sickness, I also would not be sick. Why? Manjusri, for the bodhisattva, the world consists only of living beings, and sickness is inherent in living in the world. Were all living beings free of sickness, the bodhisattva also would be free of sickness. For example, Manjusri, when the only son of a merchant is sick, both his parents become sick on account of the sickness of their son. And the parents will suffer as long as that only son does not recover from his sickness. Just so, Manjusri, the bodhisattva loves all living beings as if each were his only child. He becomes sick when they are sick and is cured when they are cured. You ask me, Manjusri, whence comes my sickness; the sicknesses of the bodhisattvas arise from great compassion."
From the VIMALAKIRTI NIRDESA SUTRA, translated by Robert A. F. Thurman