Saint Francis wrote:
An Act of Love to the Blessed Sacrament
I believe Thou art present in the Blessed Sacrament, O Jesus. I love Thee and desire Thee. Come into my heart. I embrace Thee, O never leave me. I beseech Thee, O Lord Jesus, may the burning and most sweet power of Thy love absorb my mind, that I may die through love of Thy love, Who wast graciously pleased to die through love of my love.
An act of spiritual communion expresses our belief in Christ’s Real Presence in the Eucharist and asks Him to come into our heart even when we cannot receive Him physically.