[100] [cap.21] But it is not sufficient for the lover of wisdom to have a hope of good things, and to expect all kinds of admirable things, because of the predictions given to him, but unless he also knows the manner in which he is to arrive at the succession of his inheritance, he thinks it very grievous, inasmuch as he thirsts after knowledge, and has an insatiable desire of attaining to it; on which account he puts a question, saying, "O Lord God, how shall I know that I shall inherit it?"