For some time, the single procession of the Spirit made good sense to me. In the monarchy of God, the right order seems to be: Father, Son, and Holy Spirit. The Father is the sole principle who begets the Son and from whom the Spirit proceeds.
I found the phrase “the Spirit proceeds from the Father through the Son” helpful because it mediated the two positions (single and double procession). Like single procession, the Spirit comes from the Father. And like double procession, the Spirit comes from the Father by coming through the Son.
I was satisfied. Then I read Thomas Aquinas and Gilles Emery. They forced me to reconsider what the Bible said and to re-reflect on my theology.