e development of concentration that, when developed & pursued, leads to the attainment of knowledge & vision. There is the development of concentration that, when developed & pursued, leads to mindfulness & alertness. There is the development of concentration that, when developed & pursued, leads to the ending of the effluents." The Buddha then adds that he uttered the last verse of this poem in connection with these four ways of developing concentration. Although the verse does not mention concentration explicitly, the use of the phrase, "nothing perturbing" is apparently a reference to the states of concentration called imperturbable. See MN 102, note 2, and MN 106, note 1. - --> - - - -