Bismillahir Rahmanir Rahim
Alhamdulillah we have for us the blessing of scholars whom have gone before us and paved the way with clear understandable text of explanations.
Dr. Saleh as Saleh (rahimahullah, may Allah make his stay in the barzakh one of ease and comfort and grant him the scent of Jannah, and forgive his sins aameen) Has left behind for us an explanation of what true belief to a Muslim means. And he did this step by step. Please if you are trying to learn your religion, trying to brush up on increasing your eeman, then use this treasure of knowledge to assist you in getting there inshaAllah.
BarakAllahu Feekunna Ya Muslimaat