In all our activities we may be seeking God: in our work, on our social occasions, as we walk along the road, even when we are so busy that we have not time to think of anything except what we are doing... God can deal with us under a thousand forms for our spiritual hallowing. Behind all the strange puzzles of life there is the secret working of God, creating life, creating character, accepting service -- all sorts of spiritual shaping going on.
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.