Ben wrote:Webu Sayadaw, from his compilation of discourses in Way to Ultimate Calm, and from John Coleman's Quiet Mind was a life-long practitioner of the dhutanga of not ever lying down, not even to sleep. He did sleep, but did so the sitting position. That is not to say that he slept regularly nor that it may have been of an altogether different qualitative experience but sleep he did.
For what it's worth, that was my understanding too.
Like Dave, I would like to know what significance this matter holds to villkorkarma.
"Having understood name-and-form, which is a product of prolificity,
And which is the root of all malady within and without,
He is released from bondage to the root of all maladies,
That Such-like-one is truly known as 'the one who has understood'." (Snp 3.6)
"Whether I were to preach in brief, Sāriputta, or whether I were to preach in detail, Sāriputta, or whether I were to preach both in brief or in detail, Sāriputta, rare are those who understand." (A I 333, Sāriputtasutta)