When we think of communion with the Spirit there is a phrase that comes to mind that I read about three decades ago. It was in a little booklet on Christian meditation. There was a phrase that said, “We use the imagination to descend with the mind into the heart.” My own experience is that when I embrace this practice, which I consider to be a practical truth, I encounter the Holy Spirit. If we consider the facts we know that He is in us revealing Christ (Col. 1:27) and guiding us into all truth.
17 the Spirit of truth, whom the world cannot receive, because it neither sees Him nor knows Him; but you know Him, for He dwells with you and will be in you. John 14:17 (NKJV)
26 But when the Helper comes, whom I shall send to you from the Father, the Spirit of truth who proceeds from the Father, He will testify of Me. John 15:26 (NKJV)
13 However, when He, the Spirit of truth, has come, He will guide you into all truth; for He will not speak on His own authority, but whatever He hears He will speak; and He will tell you things to come. 14 He will glorify Me, for He will take of what is Mine and declare it to you. John 16:13-14 (NKJV)
So back to my experience. When I use my imagination to descend with my mind into my heart I encounter the Holy Spirit within, unveiling Jesus and His character. Practically it is simply a matter of turning within and letting my attention settle into my spirit which is experientially located in the core of my being (see Prov. 20:27). My qualifier is that whatever I experience or hear I need to weigh against His word. At the same time whether walking, in the middle of a conversation, weighing a situation – I, and you, can commune with the Holy Spirit to receive guidance and in the process either maintain our heart at rest if it is already there or bring it to rest if it is not already there.
So, enjoy your heart at rest in Him.