Live your life so that the fear of death can never enter your heart. When you arise in the morning, give thanks for your food and the joy of living. And if perchance you see no reason for giving thanks, rest assured the fault is in yourself.
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.