Famed modern theologian...
Famed modern theologian Karl Barth nicely sets the tone for celebrations of the Lord's Supper and of its first celebration in the Last Supper:
The Lord's Supper ought to be more firmly regarded from the Easter standpoint than is generally the case. It is not primarily a mourning or funeral meal, but the anticipation of the marriage of the Lamb. The Supper is a joyous meal: the eating of his Jesus Christ's flesh and the drinking of his blood is meat and drink unto life eternal in the midst of our life. We are guests at his table and so no longer separated from himself.