Muhammad ibn al-Hasan Abu Abdullah said,

[indent]Learn! for is learning is an adornment for one who possesses it, a virtue and a prelude to every praiseworthy action. Profit each day by increasing [your] knowledge and swimming in the sea of beneficial knowledge. Give yourself up to the study of jurisprudence, for the knowledge of jurisprudence is the best guide to piety and the fear of God, and it is the straightest path to the ultimate goal. It is the milestone leading to the ways of proper guidance; it is the fortress that saves one from all hardships. Indeed, one godly person versed in jurisprudence is more powerful against Satan than a thousand [ordinary] worshippers.

Imam Zarnuji, Ta’lim al-Muta’allim, pp. 3, Starlatch Press.