How can a Muslim build a sound creed that reflects on his behavior and actions in this world and guarantees him salvation on the Day of Resurrection?

The sound Islamic creed is derived from the Quran, the Sunnah, and the consensus of the righteous predecessors. Studying books of creed penned by scholars known for the purity of their عقيدة (creed) and their freedom from innovations, who drew their knowledge from the aforementioned sources, helps in building a sound creed and instills positive effects in the soul, such as mindfulness of Allah and submission to Him.