There is a lot of talk about spirituality as something we DO or earn, but Spirit is our essence, what we really are.
Psychologically, Spirit is expressed as Self, most of which is unconscious. And just as God (however we conceive of that) is All That Is, containing all good, all evil and all in between, expressed and unexpressed, our Self contains all that we are, feel, think, all our shadows and darkness, our light, and the psyche's etiological drive to expansion of consciousness and self-expression.
Spirit also imposes on us small humans the obligation to relate to ourselves, the different aspects of ourselves, to others and to all of life as ethical beings.... We are, at the deepest level, responsible to Life itself.
I have often been comforted and strengthened by these verses said to Arjuna by the Lord Shiva in his Krishna form in the Bhagavad Gita, when Arjuna grieves for all who will kill and be killed in an upcoming battle:
'The Spirit is neither born nor does it die at any time. It does not come into being or cease to exist. It is unborn, eternal, permanent, and primeval. The Spirit is not destroyed when the body is destroyed. (Gita, 2.20)
"Weapons do not cut this Spirit, fire does not burn it, water does not make it wet, and the wind does not make it dry. The Spirit cannot be cut, burned, wet, or dried. It is eternal, all-pervading, changeless, immovable, and primeval. Atma is beyond space and time. (Gita, 2.23-24)