[O you who believe] take your precautions, that against which you exercise caution, such as Satan's casting [of his insinuations] and his evil whisperings and his leading of you to perdition by means of [his] deception, and [such things as] the manifestation of the attributes of your souls and their acquisition of mastery over you, for these are the most hostile of all your enemies; then move forward in companies, wayfare in the path of God in groups, each party [following] the spiritual path of a perfect, knowledgeable shaykh, or move forward all together, along the path of the affirmation of Oneness and that of submission (islām) following closely [the path of] the Prophet.