Is Islam restricted to the pillars of faith, the pillars of Islam, and Ihsan only?

The ranks of the religion are: Islam, Iman (faith), and Ihsan (excellence), and all the laws of the religion fall under them. They encompass the explanation of all functions of outward and inward acts of worship, from the tenets of faith, to actions of the limbs, and the sincerity of inner thoughts. Ihsan includes Iman, and Iman includes Islam. Those who perform Ihsan are more specific than the believers (Mu'minun), and the believers (Mu'minun) are more specific than the Muslims.