This beautiful reflection by Blessed John Henry Newman can inspire us and offer direction to us both as we discern our mission, or as we struggle to respond to the challenges of taking the next step forward in our mission:
God has created me to do Him some definite service;
He has committed some work to me which He has not committed to another. I have my mission—I never may know it in this life, but I shall be told it in the next. Somehow I am necessary for His purposes, as necessary in my place as an Archangel in his—if, indeed, I fail, He can raise another, as He could make the stones children of Abraham. Yet I have a part in this great work; I am a link in a chain, a bond of connexion between persons. He has not created me for naught. I shall do good, I shall do His work; I shall be an angel of peace, a preacher of truth in my own place, while not intending it, if I do but keep His commandments and serve Him in my calling.
Therefore I will trust Him. Whatever, wherever I am, I can never be thrown away. If I am in sickness, my sickness may serve Him; in perplexity, my perplexity may serve Him; if I am in sorrow, my sorrow may serve Him. My sickness, or perplexity, or sorrow may be necessary causes of some great end, which is quite beyond us. He does nothing in vain; He may prolong my life, He may shorten it; He knows what He is about. He may take away my friends, He may throw me among strangers, He may make me feel desolate, make my spirits sink, hide the future from me—still He knows what He is about.
O Adonai, O Ruler of Israel, Thou that guidest Joseph like a flock, O Emmanuel, O Sapientia, I give myself to Thee. I trust Thee wholly. Thou art wiser than I—more loving to me than I myself. Deign to fulfil Thy high purposes in me whatever they be—work in and through me. I am born to serve Thee, to be Thine, to be Thy instrument. Let me be Thy blind instrument. I ask not to see—I ask not to know—I ask simply to be used.
– From Blessed John Henry Newman. The complete meditation can be found online here: http://www.newmanreader.org/works/meditations/meditations9.html