Is it a concept? No, a Person. 

Let us not forget: the Holy Spirit is God, a Person within the Trinity! 

Too often we imagine the Spirit as some diffuse force. Yet I once heard a priest say that within the Trinity, the Holy Spirit is the One who is most "God-like." He is everywhere—He dwells even within our hearts.

This way of understanding also resonates with our non-Christian brothers and sisters: the Spirit is almost faceless, astonishingly hidden. If we allow Him, He radiates through us—through our gestures, our words, our actions. St. Maximilian Kolbe once said: if you want to glimpse the smile of the Holy Spirit, look to Mary. She is His spouse, the one in whom He found complete freedom. Through her we can also grasp God's "feminine" attributes, for indeed: "male and female He created them, in His image."

Thus, tender love, healing strength, the giving of life, nourishment, words of consolation, encouragement—these are all the faces of the Spirit. And yet above all we must remember: when we speak to the Holy Spirit, we are addressing not an abstract force, but a real Person—Love itself, made personal.

"In the beginning God created the heavens and the earth.

Now the earth was formless and empty, darkness was over the surface of the deep,

and the Spirit of God was hovering over the waters."

— Genesis 1:1–2