The Holy Spirit is invisible to the natural eye. He was compared by Jesus to the wind: The wind bloweth where it listeth, and thou hearest the sound thereof, but canst not tell whence it cometh, and whither it goeth: so is every one that is born of the Spirit. (John 3:8)
Inihalintulad ito ni Jesus sa hangin: Humihihip ang hangin kung saan niya ibig, at naririnig mo ang kaniyang ugong, ngunit hindi mo nalalaman kung saan nanggagaling, at kung saan naparoroon: gayon ang bawat ipinanganak ng Espiritu. (Juan 3:8)