What does "developed in discernment" mean?

From the Lonaphala Sutta : > Now, a trifling evil act done by what sort of individual is > experienced in the here & now, and for the most part barely appears > for a moment? There is the case where a certain individual is > **developed in the body, developed in virtue, developed in mind [i.e., > painful feelings cannot invade the mind and stay there], developed in > discernment: unrestricted, large-hearted, dwelling with the > immeasurable**. A trifling evil act done by this sort of individual is > experienced in the here & now, and for the most part barely appears > for a moment. What developed in body and developed in mind means, is elaborated in MN36 : > "And how is one developed in body and developed in mind? There is the > case where a pleasant feeling arises in a well-educated disciple of > the noble ones. On being touched by the pleasant feeling, he doesn't > become impassioned with pleasure, and is not reduced to being > impassioned with pleasure. His pleasant feeling ceases. With the > cessation of the pleasant feeling there arises a painful feeling. On > being touched with the painful feeling, he doesn't sorrow, grieve, or > lament, beat his breast or becomes distraught. When that pleasant > feeling had arisen in him, it didn't invade his mind and remain > because of his development of the body. When that painful feeling had > arisen in him, it didn't invade his mind and remain because of his > development of the mind. This is how one is developed in body and > developed in mind." What being developed in virtue (sila) means, is covered by the Five Precepts (and also the Eight Precepts and Ten Precepts ), Right Speech , Right Action and Right Livelihood . These links provide more info on these. However, what does "developed in discernment" mean? Please also provide references from the scriptures.