a brief excerpt from.Dorothy Day's Reflections During Advent-Part Three, Chastity, 12/10/66 (https://www.catholicworker.org/dorothyday/articles/561.html)

"It is generally conceded, taking in the whole man as it does, that the marriage act purged of impurities is the nearest thing to the beatific vision we can know. The intense pleasure and delight of the act itself may be like a sword piercing the heart, but though momentary in itself, it colors the hours and days, people and events, before and after, so that one is apt to feel that one is seeing others as God sees them, loving them as God loves them."