TO PRESUME that only visible forms of consciousness are involved in the unfolding of the universe is to limit the Power, Freedom and Wisdom OF GOD.
1. HOW DO WE KNOW ANGELS EXIST?
Reason suggests that there should be invisible beings, closer to God's likeness in their nature and the history of world religions all admit of angelic experience.
Do you believe that Jesus is the Son of God who existed before Abraham? If you do, you must take his words seriously when he took a child in their midst and said to his apostles: "See that you never despise one of these little ones. I assure you, their angels in heaven constantly behold my heavenly Father's face." (Mt. 18:10)
2. CREATION OF THE ANGELS: The angels or invisible personal ruling powers were created in the beginning when God said: "'Let there be light,' and there was light.'" (Gn 1:3) and in the book of Job we read: "Where were you when I founded the earth?...While the morning stars sang in chorus and all the sons of God shouted for joy?" St. Thomas Aquinas maintained that the angels were created in the beginning because they are part of the cosmic unity which constitutes the good of the universe. ref1
3. NATURE OF THE ANGELS
Angels are spiritual beings (no material body) having a sheer intellect and a powerful will. Each angel is an immediate creation of God, that is, a species into itself since no angel is generated by another angel.
Their knowledge is far superior to that of men because it is innate. Man gains knowledge by abstracting from sense-objects over eons of time, but angels were endowed from their creation with a knowledge of the mysteries of the universe with certain limitations since Christ said that not even the angels of God know the time of the end of the world. St. Thomas Aquinas argues that the power of intellectual substances [angels] is greater and more universal than that of intellects united to a body. St. Augustine wrote that the knowledge of the angels is greater than that of demons because they contemplate the ultimate reasons of the cosmic order through the Word of God. See ref2&3
Motion: Since angels have no physical body, they are not restricted by place, rather, they are where they are acting and are instantaneously present where they decide to be.
Time, as we know it, is our measurement of motion. Since angels do not have bodies and are not restricted by place, they do not measure time by measuring physical motion. Their time is measured by their own movement, their own unique time.