In addition to the subtle changes in the priest's voice level in the Liturgy, the Mass of the Latin Rite contains subtle changes in direction and vital gestural nuances that articulate the inexpressible and tease the senses and the mind into a willing submission to the Holy Spirit. The changes in the direction that the priest faces create necessary contrasts that engage the attention, elicit participation and form in us a right orientation. The gestures of the priest (and movements of the servers) punctuate the liturgical rites and move the congregation in a gentle and dignified manner toward the supreme moment in the Liturgy—the making present of Jesus, Body and Blood, Soul and Divinity, and communion with Him.
Ad orientem worship preserves the depth of the Mystery and an awareness of the relationship between time and eternity. Versus populum worship is popular, or "peopular", which is to say it elevates the improvement of self esteem above holy selflessness, a setting aside of selfish preoccupations that is necessary for communion with Jesus.