Dear Guys.. and especially to Dukkhanirodha,
This is an excerpt from Late. Mahasi Sayadaw commentary on Dhammacakkapavattana Sutta.
A log of snappy wood freshly cut from a sycamore tree and soaked in water cannot produce fire by being rubbed with a similar piece of wet sappy wood or with a piece of some other wood. Just so, while still entangled with objects of sensual desires such as wife and family, while still delighting in passionate pleasures and lustful desires are not yet quieted within him, however strenuously someone strives, he is incapable of wisdom, insight and incomparable full awakening. This was the first simile that occurred to the Bodhisatta.
Even if the sycamore log is not soaked in water but is still green and sappy, being freshly cut from the tree, it will also not produce any fire by friction. Just so, even if he has abandoned the objects of sensual desires such as wife and family and they are no longer near him, if he still delights in thoughts of passionate pleasures and lustful desires still arise in him, he is incapable of wisdom, insight or full awakening. This is the second simile.
According to the Commentary, this simile has a reference to the practices of Brahma dhammika ascetics. Those Brahmins led a holy ascetic life from youth to the age of forty-eight when they went back to married life in order to preserve the continuity of their clan. Thus, while they were practising the holy life, they would have been tainted with lustful thoughts.
The third simile concerns with dry sapless logs of wood not soaked in water. These logs of dry wood will kindle fire when rubbed against one another. Similarly, having abandoned objects of sensual desires and weaned himself of lustful thoughts and cravings, he is capable of attaining wisdom, insight and full awakening, whether he practises extreme austerity or whether he strives painlessly without torturing himself.
So, I'm with Dukkhanirodha on this.. http://www.buddhanet.net/wheeld01.htm