Desire as Prayer (St. Augustine)

For the desire of your heart is itself your prayer. And if the desire is constant, so is your prayer...
Therefore, if you wish to pray without ceasing, do not cease to desire. 
The constancy of your desire will itself be the ceaseless voice of your prayer. And that voice of your prayer will be silent only when your love ceases... 
The chilling of love means that the heart is silent; while burning love is the outcry of the heart. If your love is without ceasing, you are crying out always; if you always cry out, you are always desiring; and if you desire, you are calling to mind your eternal rest in the Lord.

--St. Augustine