Angels are messengers from God. In the past they delivered important messages and they were expected to be acted on with faith. The LORD requires that his people be people of faith. Angels were angry when the message was taken lightly, perhaps because God was angry too?
Gen 18:9 And they said unto him, Where is Sarah thy wife? And he said, Behold, in the tent.
Gen 18:10 And he said, I will certainly return unto thee according to the time of life; and, lo, Sarah thy wife shall have a son. And Sarah heard it in the tent door, which was behind him.
Gen 18:11 Now Abraham and Sarah were old and well stricken in age; and it ceased to be with Sarah after the manner of women.
Gen 18:12 Therefore Sarah laughed within herself, saying, After I am waxed old shall I have pleasure, my lord being old also?
Gen 18:13 And the LORD said unto Abraham, Wherefore did Sarah laugh, saying, Shall I of a surety bear a child, which am old?
Gen 18:14 Is any thing too hard for the LORD? At the time appointed I will return unto thee, according to the time of life, and Sarah shall have a son.
Gen 18:15 Then Sarah denied, saying, I laughed not; for she was afraid. And he said, Nay; but thou didst laugh.
Sarah laughed within herself, but God searches our hearts. He discerns what is real faith and what is not. The angel spoke to her unbelief. She had already messed things up by giving her handmaiden to Abraham to make them a son. This resulted in Ishmael, the son of the flesh and the enemy of God's promised chosen people through Isaac. The son's of Ishmael, the Arab nations fight with Israel until the end.
Zacharias, father of John the Baptist
Luke 1:13 But the angel said unto him, Fear not, Zacharias: for thy prayer is heard; and thy wife Elisabeth shall bear thee a son, and thou shalt call his name John.
Luke 1:14 And thou shalt have joy and gladness; and many shall rejoice at his birth. Luke 1:15 For he shall be great in the sight of the Lord, and shall drink neither wine nor strong drink; and he shall be filled with the Holy Ghost, even from his mother's womb.
Luke 1:16 And many of the children of Israel shall he turn to the Lord their God. Luke 1:17 And he shall go before him in the spirit and power of Elias, to turn the hearts of the fathers to the children, and the disobedient to the wisdom of the just; to make ready a people prepared for the Lord.
Luke 1:18 And Zacharias said unto the angel, Whereby shall I know this? for I am an old man, and my wife well stricken in years.
Luke 1:19 And the angel answering said unto him, I am Gabriel, that stand in the presence of God; and am sent to speak unto thee, and to shew thee these glad tidings.
Luke 1:20 And, behold, thou shalt be dumb, and not able to speak, until the day that these things shall be performed, because thou believest not my words, which shall be fulfilled in their season.
His prayers were answered to have a son, but he probably had given up praying for this, because of their old age. Zacharias could not believe the angel, so the angel gave him a sign and a punishment; he would be unable to speak until the child was born nine months later. Keep praying for your loved ones, you people of faith for God hears and respects your faith.
Mary, the birth mother of Jesus
Mary was a humble virgin probably about sixteen years old.
Luke 1:26 And in the sixth month(of Elizabeth's pregnancy) the angel Gabriel was sent from God unto a city of Galilee, named Nazareth,
Luke 1:27 To a virgin espoused to a man whose name was Joseph, of the house of David; and the virgin's name was Mary.
Luke 1:28 And the angel came in unto her, and said, Hail, thou that art highly favoured, the Lord is with thee: blessed art thou among women.
Luke 1:29 And when she saw him, she was troubled at his saying, and cast in her mind what manner of salutation this should be.
Luke 1:30 And the angel said unto her, Fear not, Mary: for thou hast found favour with God.
Luke 1:31 And, behold, thou shalt conceive in thy womb, and bring forth a son, and shalt call his name JESUS.
Luke 1:32 He shall be great, and shall be called the Son of the Highest: and the Lord God shall give unto him the throne of his father David:
Luke 1:33 And he shall reign over the house of Jacob for ever; and of his kingdom there shall be no end.
Luke 1:34 Then said Mary unto the angel, How shall this be, seeing I know not a man? Luke 1:35 And the angel answered and said unto her, The Holy Ghost shall come upon thee, and the power of the Highest shall overshadow thee: therefore also that holy thing which shall be born of thee shall be called the Son of God.
Luke 1:36 And, behold, thy cousin Elisabeth, she hath also conceived a son in her old age: and this is the sixth month with her, who was called barren.
Luke 1:37 For with God nothing shall be impossible.
Luke 1:38 And Mary said, Behold the handmaid of the Lord; be it unto me according to thy word. And the angel departed from her.
She responded in simple faith. The LORD honors humble faith and very much does not like unbelief and those who mock his word. Too many have no fear of God. God's word is truth and we are to believe and fear him who created us for his glory. God loves us through His Son Jesus Christ. Abide in him and abide in God's love.