What kind of life is required for practicing Metta? Here's the quote from Karaniya Metta Sutta:


  "This is to be done by one skilled in aims who wants to break
  through to the state of peace: Be capable, upright, &amp;
  straightforward, easy to instruct, gentle, &amp; not conceited,
  content &amp; easy to support,
  with few duties, living lightly, with peaceful faculties, masterful, modest, &amp; no greed for supporters."


So one should be content and easy to support, unburdened with duties and living lightly. According to this standard, what is the best lifestyle for practicing Metta? How can one practice Metta in this [predominantly] materialistic world? Is Metta best practiced as a monk?
"content &amp; easy to support" is Santussako ca subharo ca.

There's a fairly long description of that, with sutta references, in this definition of asantuṭṭhitā.

I think that "easy to support" is one of the things that the Buddha said that monks ought to be.

It's a formula, a phrase that's used in several suttas (I imagine it's in the Vinaya too).

The commentary says that the Karaniya Metta Sutta was addressed to a group of all/only monks.