Dini islom bo vujudi nihoyati soddagii usuli etiqod va marosimash, dar tuli ziyoda az 1400 soli mavjudiyati khud yak nizomi murakkab va pechidai ilohiyotivu falsafi va ideologivu huquqi ba vujud ovarda ast. Az in ru fahmish va shinokhti islom pesh az hama donishi amiqi sarchashmahoi on va soniyan omuzishi hamatarafai tahavvulotu tagyiroti badii onro taqozo mekunad. Vagar na har guna kushishi shinokhtu darki mohiyati islom besamar khohad bud.
Sarchashmahoi asosii khattii islom Quron va Sunna meboshad. Vale dar zaminai in du chand sarchashmai digar ba vujud omad, ki har chand dar martaba az Quronu Sunna poyinand, baroi ravshani andokhtan ba bisyore az masoili khatto dar Quron zikrshuda, donistan va istifoda az onho zarur ast. Inchunin sarchashmaho tafsirho, tavilho, hadisho va gayra meboshand, ki dar zaminai on ilmhoi islomi ba vujud omadand.