Communion with God, is distinct from union. Those who are united to Christ are one spirit with God.
This union with Christ is something that DOES NOT ebb and flow, but our communion with Christ ebbs and flows based upon sacraments and disciplines of praying, meditation on Gods word and fasting.
There are many traditions in Catholic and protestant churches that have rules of fasting prior to The Table of Covenant.
But I like to give you three main thoughts today to deepen your spiritual walk.
Taking the Blood of Jesus Imparts Life.
Fasting is a Sacrament of Death.
Combining these 2 Sacraments; Fasting & The Lords Table. Divine Life is imparted to Dying Flesh.