What is the meaning of the phrase "Ahl al-Sayr wa al-Sulook" (people of journeying and conduct) which is used by 'ulama' (scholars) of 'aqeedah (creed) in their books?

The people of the “Sayr and Sulook” (spiritual journey and conduct) are those who tread the path of righteousness, and are concerned with souls and their conditions, and how to address their affairs with truthfulness, sincerity, and vigilance.