19-20:

If he recites many teachings, but
    -- heedless man --
doesn't do what they say,
like a cowherd counting the cattle of
            others,
he has no share in the contemplative life.

If he recites next to nothing
but follows the Dhamma
in line with the Dhamma;
    abandoning passion,
        aversion, delusion;
    alert,
    his mind well-released,
        not clinging
    either here or hereafter:
he has his share in the contemplative life.