What is Spirituality?

Spirituality is the meaningful understanding of the existence of God and behaving accordingly.

I would rather concentrate on the main question, "What is Spirituality". You did provide an answer in the question itself; nevertheless, I will offer here my perspective on spirituality. A simple answer would be being as spirit is spirituality. However, we are mortal beings. How can we be like spirit? We have a material body and even our soul is just a soul, it is not spirit. Only God is a pure spirit. My Bible tells me, though God created man out of dust, but he had breathed into his nostril his own breath of life. That breath of life is the soul in me. That soul became the inner, vital, and spiritual principle for the humankind. The soul in me decides if my nature would be godly or ungodly. I would be spiritual only if I have a godly nature. If I know, what godly nature is then I would also know what spirituality is. If we look around, we will find that in God's realm silence prevails. The sun rises and sun sets silently. Night changes into day and day silently. The stars are twinkling in the sky so silently. The plants grow and bring forth fruits so silently. We see that in God's realm there is no loud noise and no restlessness. There is only silence. How will we distinguish a person who is spiritual from the one who is not? The non-spiritual person would be loud and boisterous. Spiritual person would always remain calm even in adverse situation. Another thing I said is God is pure spirit. If our thoughts and actions are pure then we are spiritual. Next is God is loving and caring. If we too are loving and caring then we are spiritual. Everything God does he does for universal good. To be spiritual we also should be able to view things in wider perspective and our thoughts and actions we must direct for universal goodness. For being spiritual God's own conduct must seep into our nature. God confers spirituality on those who deserve it. He bestows it on them as His grace. Only those who are obedient to God; only those who love and honor him; they alone earn the right to be spiritual.