(33) How Metta-jhana is achieved
Even if a feeling of loving-kindness occurs wishing others to gain happiness with his mind evenly balanced after the achievement of simasambheda, a Yogi, while developing metta through meditation, experiences nimittam, the first sign of mental illumination. He or she also realises the upacara-jhana. Then after his realisation of upacara-jhana-samadhi, if he continues practising by developing several times the sensation arising out of nimitta, appana-jhana will soon be achieved. This is according to what has been stated in the Visuddhimagga. This appana-jhana is nothing but the three kinds of jhanas as mentioned earlier.
After attainment of all these jhanas, 528 kinds of metta can be developed continuously in sequence through the mental faculty of metta-jhana.
Presently, before winding up the second part of this teachings we shall develop metta to gain kusala (merits) and paramita (perfection). We will therefore proceed to contemplate on the vanishing of voice-rupa in the course of our recitation with a sincere and hearty feeling towards all beings for their welfare and happiness.
And may all those who are respectfully listening to this Dhamma on the Brahmavihara, speedily attain Nibbana.