Our natural Will is to have God, and the Good Will of God is to have us; and we may never cease from willing nor from longing till we have Him in fullness of joy: and then may we no more desire.
Pray, even if you feel nothing, see nothing. For when you are dry, empty, sick or weak, at such a time is your prayer most pleasing to God, even though you may find little joy in it. This is true of all believing prayer.
