Mr. Ledyard, thanks for refering to an interesting reading.
Vimalakirti Sutra wrote:
He lived at home, but remained aloof from the realm of desire, the realm of pure matter, and the immaterial realm. He had a son, a wife, and female attendants, yet always maintained continence. He appeared to be surrounded by servants, yet lived in solitude. He appeared to be adorned with ornaments, yet always was endowed with the auspicious signs and marks. He seemed to eat and drink, yet always took nourishment from the taste of meditation. He made his appearance at the fields of sports and in the casinos, but his aim was always to mature those people who were attached to games and gambling. He visited the fashionable heterodox teachers, yet always kept unswerving loyalty to the Buddha. He understood the mundane and transcendental sciences and esoteric practices, yet always took pleasure in the delights of the Dharma. He mixed in all crowds, yet was respected as foremost of all.
In order to be in harmony with people, he associated with elders, with those of middle age, and with the young, yet always spoke in harmony with the Dharma. He engaged in all sorts of businesses, yet had no interest in profit or possessions.
Man! He was not a monk, but did this man ever left his internal monastery?
I remember there were also some references to another person who was a kshatra and ruler (I don't remember his name), who reached self-realization.