Today was the feast of St. Teresa of Avila, Doctor of the Church. From The Way of Perfection (Chapter 17):
I do not mean that it is for us to say what we shall do, but that we must do our best in everything, for the choice is not ours but the Lord’s. If after many years He is pleased to give each of us her office, it will be a curious kind of humility for you to wish to choose; let the Lord of the house do that, for He is wise and powerful and knows what is fitting for you and for Himself as well. Be sure that, if you do what lies in your power and prepare yourself for high contemplation with the perfection aforementioned, then, if He does not grant it you (and I think He will not fail to do so if you have true detachment and humility), it will be because He has laid up this joy for you so as to give it you in Heaven, and because, as I have said elsewhere, He is pleased to treat you like people who are strong and give you a cross to bear on earth like that which His Majesty Himself always bore.
What better sign of friendship is there than for Him to give you what He gave Himself? It might well be that you would not have had so great a reward from contemplation. His judgments are His own; we must not meddle in them. It is indeed a good thing that the choice is not ours; for, if it were, we should think it the more restful life and all become great contemplatives. Oh, how much we gain if we have no desire to gain what seems to us best and so have no fear of losing, since God never permits a truly mortified person to lose anything except when such loss will bring him greater gain!