The author aims to deepen the reader’s understanding of Tawhid as the essence of Islam, emphasizing that a Muslim must continually renew their ʾīmān (faith) by reflecting on the meaning of Tawhid lā ilāha illā Allāh and rejecting all forms of associating partners with Allah. The book stresses that awareness of shirk — both major and minor — is essential to safeguard one’s faith and avoid errors that can weaken or nullify Tawhid.