Let it be clear that to affirm the covenant of Bai’at with the tongue alone amounts to nothing unless it is practiced with full, heartfelt resolve. Thus, whosoever fully acts upon my teachings enters that house of mine, concerning which God Almighty has promised in His Word:
اِنِّيْ اُحَافِظُ كُلَّ مَنْ فِي الدَّارِ
That is, “I shall protect everyone who is within the four walls of your home”. This should not be taken to mean only such people who dwell in my house made of brick and mortar; rather, this also refers to all those who follow me completely and dwell in my spiritual home. To follow me, it is necessary for them to believe that they have an Omnipotent, Self-Sustaining God, who is the Creator of all things, and whose attributes are eternal, everlasting and unchangeable. He has no father and no son. He is above suffering, being crucified and killed. He is such that despite being far, He is near; and despite being near, He is far. Despite being One, His manifestations are diverse.
(Hazrat Mirza Ghulam Ahmadas, Noah’s Ark, p. 19)