A blessing is a form of grace

A blessing is a form of grace; it is invisible. Grace is the permanent climate of divine kindness. There are no limits to it... For one who believes in it, a blessing can signal the start of a journey of transformation. It belongs to the same realm as the inner life— its effect becomes only indirectly visible in the changed quality of one's experience. Where before gravity and deadness had prevailed, there is now a new sense of animation and lightness. Where there was grief, a new sense of presence comes alive. In the wall of blindness a window of vision opens.
~ John O'Donohue,"To Retrieve the Lost Art of Blessing," in TO BLESS THE SPACE BETWEEN US