In the translation paragraph #2 it is said:
“Idha, bhikkhave, ekacco puggalo mettāsahagatena cetasā ekaṃ disaṃ pharitvā viharati, tathā dutiyaṃ tathā tatiyaṃ tathā catutthaṃ. Iti uddhamadho tiriyaṃ sabbadhi sabbattatāya sabbāvantaṃ lokaṃ mettāsahagatena cetasā vipulena mahaggatena appamāṇena averena abyāpajjena pharitvā viharati. So tadassādeti, taṃ nikāmeti, tena ca vittiṃ āpajjati.”
“Bhikkhus, There is an individual who cultivates metta bhavana in four directions. Thus he keeps pervading above, below, and all around the universe with compassion.”
What means “four directions”?