Thou sweet Well for all who thirsteth in the desert! It is closed to the one who speaks, but it is open to all who are silent. When the one who is silent comes, lo, that one finds the Well.
The smile of the contemplative in the presence of the Beloved is merely a physical expression of the total joy one perceives as one communes with God. St. Bernard used to say, "The joy of being in love is in the very loving." In other words, joy is not to be sought for itself, but is a by-product of love, and the smile is but the physical, exterior expression of the inner joy-love.