Hakim al Umma Mawlana Ashraf Ali Thanawi (Allah have mercy on him) said,
‘The goal of this path (of Tasawwuf) is cleansing (tazkiya) of the lower self (nafs).
This cleansing is done for two things (in particular): lust and arrogance.
The cleansing is done by being in the company (suhba) of a perfect Shaikh (for this purpose). This is because he has gone through this process himself before (and therefore, knows how to do this).
Ma’asir page 287