......spirituality is not a high intellectuality, not idealism, not an ethical turn of mind or moral purity and austerity, not religiosity or an ardent and exalted emotional fervour, not even a compound of all these excellent things; a mental belief, creed or faith, an emotional aspiration, a regulation of conduct according to a religious or ethical formula are not spiritual achievement and experience.
These things are of considerable value to mind and life; they are of value to the spiritual evolution itself as preparatory movements disciplining, purifying or giving a suitable form to the nature; but they still belong to the mental evolution,—the beginning of a spiritual realisation, experience, change is not yet there.

Spirituality is in its essence an awakening to the inner reality of our being, to a spirit, self, soul which is other than our mind, life and body, an inner aspiration to know, to feel, to be that, to enter into contact with the greater Reality beyond and pervading the universe which inhabits also our own being, to be in communion with It and union with It, and a turning, a conversion, a transformation of our whole being as a result of the aspiration, the contact, the union, a growth or waking into a new becoming or new being, a new self, a new nature.

Sri Aurobindo
The Life Divine

Omnipresent Reality and the Universe

The Last six chapters of " The Life Divine "