As we can see from His name Holy Spirit…

He is holy.  He is holy simply because He is God.  He is the holy spirit of God and we call Him Holy Spirit.  Thus, being God, we know that He is holy.  As 1 John 1:5 indicates, God is light and in Him is no darkness at all.           

We also see in His name that…

 He is spirit.  Being spirit He is never visible and we can not touch Him.  But He does communicate and commune with us, from His spirit to ours, as we attempt to live in His spirit.  The more we put away the deeds of the flesh and walk in the Spirit, the more we will be able to commune with Him and sense in our spirit and in our mind (which I believe has a connection to the spirit) that He is present…