For with God nothing shall be impossible.
I cannot for the life of me see any reason in the world why anyone should be fearful and timid, saying, “I’m afraid I can’t make it; I’m afraid God can’t keep me.” God can keep the stars in their courses and the planets in their orbits; God can keep all His vast display of might everywhere throughout His universe. Surely God can keep you!
It’s like a fly perched on a seat in an airplane, moaning and trembling for fear that the plane can’t carry its weight. That plane weighs several tons and it has several tons of people and baggage on it. That fly is so light that it’s impossible, outside of a laboratory, to even weigh the little guy. And yet we can imagine him sitting there, flapping his little wings and saying, “I’m just afraid this plane won’t hold me up!”
The great God Almighty stretches forth His broad wings and moves upon the wind. God will hold you up. He’ll keep you if you turn yourself over to Him! He’ll hold you when nothing else can; nothing will be able to destroy you. AOGII076
Lord, I’m reminded of the words of Psalm 3:5: “I laid me down and slept; I awaked; for the LORD sustained me.” I’ll rest calmly in Your power today. Amen. 
- For with God nothing is ever impossible. He is able to do whatever he wishes to do (Gen. 18:14; Ps. 115:3; Jer. 32:17; Dan. 4:35; Matt. 19:26; Mark 10:27; Luke 18:27; Eph. 1:19; 3:20). Therefore he was able to give a child to Zechariah and Elizabeth though both had long given up hope of ever having one. And therefore he was also able to fulfil his promise to Mary, without any help from Joseph.
For nothing will be impossible with God. (1:37)
It is one thing to say something is going to happen, but quite another to make it happen. What Mary heard was, she realized, humanly impossible. Therefore, Gabriel reminded her that because of God’s unlimited power, nothing will be impossible with Him. The proof Gabriel offered, as noted above, was Elizabeth’s conception of John.
But there was another older couple that God miraculously allowed to conceive a child. Mary would have been familiar with the Old Testament account of Isaac’s birth to Abraham and Sarah (Gen. 18:1–15). Like Zacharias and Elizabeth, Abraham and Sarah were well beyond their childbearing years. Genesis 18:12–14 is the key passage of that account:
Sarah laughed to herself, saying, “After I have become old, shall I have pleasure, my lord being old also?” And the Lord said to Abraham, “Why did Sarah laugh, saying, ‘Shall I indeed bear a child, when I am so old?’ Is anything too difficult for the Lord? At the appointed time I will return to you, at this time next year, and Sarah will have a son.”
Gabriel’s emphatic declaration that nothing is impossible for God answered God’s rhetorical question in verse 14. If nothing is too hard for God’s omnipotence, then everything is possible with Him (Ps. 115:3; Dan. 4:35). God, whose power knows no limits (Deut. 3:24; Job 9:4; Ps. 89:13), and who is not bound by the laws of nature that He created, can accomplish anything consistent with His holy nature and purposes. Gabriel’s reminder of what God had done in the past reassured Mary of His power to keep His word to her.
 Tozer, A. W., & Eggert, R. (2015). Tozer on the almighty god: a 365-day devotional. Chicago, IL: Moody Publishers.
 Hendriksen, W., & Kistemaker, S. J. (1953–2001). Exposition of the Gospel According to Luke (Vol. 11, pp. 89–90). Grand Rapids: Baker Book House.
 MacArthur, J. F., Jr. (2009). Luke 1–5 (pp. 59–60). Chicago: Moody Publishers.