Humans are spiritual creatures.
Imagine walking around with your head on the ground, weighed down by facts, knowledge, practical wisdom. Your arms hang by your side and your legs push your bent body forward like a plow across the ground.
But obviously we can't plow through life with our brains first. Nor will we see and experience the world if we are scraping our heads across the surface of it.
Spiritual development helps to get us standing up again with your head on your shoulders.