Prayer fastens the soul to God, making it one with his will through the deep inward working of the Holy Spirit. So he says this, 'Pray inwardly, even though you feel no joy in it. For it does good, though you feel nothing, see nothing, yes, even though you think you cannot pray. For when you are dry and empty, sick and weak, your prayers please me, though there be little enough to please you. All believing prayer is precious in my sight.' God accepts the good-will and work of his servants, no matter how we feel.
~Julian of Norwich~

Upon further reflection:

In my mind I keep coming back to this picture. Reflecting on its meaning... I may be empty, not feeling have much to offer, tired, burnt out... Look up to God's divine fullness. That "wine in the sky" is a full cup...full to overflowing. Fits with Mother Julian's saying: God's goodness overflows endlessly. I also like that it is an invitation to sit down - to commune - with the Lord - with the double meaning of Holy Communion implied. All of life’s experiences baptised in the Holy Spirit of his Presence.