There is a possibility that space aliens have far advanced technology than ours.
Since this universe was created about 13.8 billion years ago, other higher forms of life than us might be born in this universe. Indeed, there are more than 300 billion solar systems in our Milky Way System while there are more than 300 billion galaxies in the whole universe. It is assumed that there are more than ten thousands planets with higher forms of life in our Milky Way System. One of them might have civilization advanced more than a million years than ours.
If our civilization continued to develop for a million years, we should develop UFOs and travel to other solar systems.
We might come to use spiritual energy in addition to material energy. We might come to control the time and space so that we can travel many light-year distance. We should go faster than light, though it is now thought impossible.
So, there is no wonder that some space aliens that were born before us might have such higher technology. They should have reached this higher level a million years or a 100 million years ago. Probably we have no effective technology and science enough to detect them. So, there is no wonder that we cannot see them.
As there is no proof that the space aliens believe in the God, the creator of the universe, we should not trust in them. We may be under surveillance of space aliens with higher science and technology without higher morality.
We should rely on Jesus Christ, the son of the God, so as to defend ourselves.
No matter how strong the space aliens are, they cannot defeat Jesus Christ, since He is the son of the creator of the whole universe. We should not worry, since space aliens are also created things. They should be under surveillance of the God.
Acts 2
“‘I saw the Lord always before me.
Because he is at my right hand,
I will not be shaken.
26 Therefore my heart is glad and my tongue rejoices;
my body also will rest in hope,
27 because you will not abandon me to the realm of the dead,
you will not let your holy one see decay.
28 You have made known to me the paths of life;
you will fill me with joy in your presence.’
29 “Fellow Israelites, I can tell you confidently that the patriarch David died and was buried, and his tomb is here to this day. 30 But he was a prophet and knew that God had promised him on oath that he would place one of his descendants on his throne.