The lower self or ego that must be disciplined and purified (Tazkiya) so the heart can turn fully to Allah.
Nafs
نفس
اَلصَّلٰوةُ وَالسَّلَامُ عَلَيْكَ يَا سَيِّدِى يَا رَسُوْلَ اللّٰه
May endless peace & blessings be upon you, our Master, O Beloved Messenger of Allah
نفس
The lower self or ego that must be disciplined and purified (Tazkiya) so the heart can turn fully to Allah.