Do you believe in angels?

Here is another one; Revelation 14:6,7 (The Message) "I saw another Angel soaring in Middle-Heaven. He had an Eternal Message to preach to all who were still on earth, every nation and tribe, every tongue and people. He preached in a loud voice, "Fear God and give him glory! His hour of judgment has come! Worship the Maker of Heaven and earth, salt sea and fresh water!""

I believe in angels. They really do exist. If you read the Bible, you will see about some of their activities. Here is one of them: Matthew 1:18-23 (New Century Version) 18 This is how the birth of Jesus Christ came about. His mother Mary was engaged[a] to marry Joseph, but before they married, she learned she was pregnant by the power of the Holy Spirit. 19 Because Mary's husband, Joseph, was a good man, he did not want to disgrace her in public, so he planned to divorce her secretly. 20 While Joseph thought about these things, an angel of the Lord came to him in a dream. The angel said, "Joseph, descendant of David, don't be afraid to take Mary as your wife, because the baby in her is from the Holy Spirit.21 She will give birth to a son, and you will name him Jesus,[b] because he will save his people from their sins." 22 All this happened to bring about what the Lord had said through the prophet: 23 "The virgin will be pregnant. She will have a son, and they will name him Immanuel,"[c] which means "God is with us."

Yes, i think so. Angel stays between us and s/he also watches everything what we are doing all the times. Of course we don't feel his presence, but I believe that the angel is exist.