Question: Is sound belief preserved merely by refuting opposing positions?
Answer: No. Sound conviction is joined to obedience, reform of conduct, hope and fear, and prayer for perseverance. The extremes of exaggeration and neglect, anthropomorphism and negation, fatalism and denial of decree, and presumption and despair must be avoided.
وَنَسْأَلُ اللَّهَ تَعَالَى أَنْ يُثَبِّتَنَا عَلَى الْإِيمَانِ وَيَخْتِمَ لَنَا بِهِ.
We ask Allah Most High to keep us steadfast upon faith and cause us to die upon it.
Follow-up: What is the final practical requirement?
Clarification: Recognize and follow truth, avoid error and seek steadfastness in faith. Religious learning remains joined to conduct and dependence upon Allah.