True vocation joins self and service, as F. Buechner asserts when defining vocation as "the place where your deep gladness meets the world's deep need." Buechner's definition starts with the self and moves toward the needs of the world: it begins, wisely, where vocation begins – not in what the world needs (which is everything), but in the nature of the human self, in what brings the self joy, the deep joy of knowing that we are here on earth to be the gifts that God created.
Spiritual understanding centers on the acceptance of a divine truth, which gradually reveals itself, rising on the horizon of the mind till it pervades all. If the mind and its reactions are brought into willing obedience to that truth, the divine truth continues to permeate the mind even more and the mind develops with it endlessly... It is we who must yield to the love of God so that our minds may be open to the divine truth.