The sunnah (prophetic practice) is to renounce the world, while the farīḍa (obligatory act) is to keep company with the Master (Mevlā, i.e., God). For the sunnah entirely signifies renouncing the world. The Book (farḍ) entirely signifies companionship with the Master. Whoever learns the sunnah and the farīḍa has attained kamāl (perfection).
Sunnah is one of the names of the path (ṭarīq). The most upright path is called the sunnah. This path is also called ṭarīq (path), ṭarīqa (Sufi order), sunan, sunnah, and ḥujja (proof). One of the virtues of the sunnah and the path is that those who possess this path have only a small share in every branch of worldly things, are content with the least of everything, and are humble in all things for the sake of Allah. (Kūt, II, 138)
Tawhid (the oneness of God) is to seek what is lawful, to learn the necessary knowledge, to have ikhlas (sincerity) in action, and to act accordingly.