Taking to spiritual life means cultivating faith because we are taking a step into what cannot be perceived by the material mind and senses.
Faith spiritualizes our mind, intelligence and senses. It purifies the ego. When we see things based on such faith, we can see things as they are.
Faith is that substance through which we can see the invisible, through which we can connect to the Absolute Truth, God.
Faith is the act of seeing beyond the region of possibility of senses and mind.