My Dad described this experience to me a long time ago, and I included it in my book ‘Starting at the Beginning’ (now out of print I’m afraid):
On Shrove Tuesday 1971, I was part of an ecumenical prayer group and all the members knew that I was waiting, in obedience to the Lord, to be filled with the Holy Spirit. Two of the group asked me if I would like them to pray with me. I agreed and they prayed but nothing happened. I was trying to will myself into the experience but that isn’t how it happens. So, in my heart I prayed, “Well, Lord, I’ve waited twelve years, I can wait longer, if that’s what you want”. And that was what the Lord was waiting for… And so it happened. My heart was bursting with a joy and peace and love I had never known before.
The way I would describe it is that it’s like standing under a great waterfall but the water not only cleanses the outside but pours through the whole body, soaking and enriching every cell. It’s realizing that every drop of that water is the Spirit’s power filling me to overflowing with the love of Jesus.