Everything from ONE
Uniform physical Universe
Uniformity of Universe is included in the credo of the Jewish people - God is One.
So there is a single starting point to everything, to Cosmos, to Life, everything and we cannot fathom where things have reached from this single point of all that exists, God of Israel. In other words, our knowledge and minds and imagination are not strong enough to think what God has made in this wonderful world of His.
Modern astronomers, cosmologists, physicists, chemists and other scientists generally assume a grand unified view of the Universe: Laws of Nature known to us in our own planet and in our Solar system are valid also in understanding cosmic events and even the origins of the world. For example, intensive research of sub-particles of atoms provides information that can be directly applied and physically examined by astronomers.
Similarly, astrobiology works on grand unified view of the Universe. For example, there are fresh estimations that there are over 8.7 million different life forms on our planet (BBC article). Earth may have been a source of life to other planets when material spinning off to space with organic things on it has perhaps reached favorable environment for growth and development - in a kind of reversal of the pansperm theory about the origins of life on our planet (BBC article). Such research, for example the probing for life on Mars or on Titan, relies on what is known about life on our planet and life forms that might possibly survive such a space trip.
Search for Extraterrestial Intelligence SETI project relies on the expectation that intelligence is in some way uniform in the Universe. We think that we can detect an intelligent signal from the noise by our analyzer algorithms.
Of course, scientists do not limit the Laws of Nature in the Universe only to those laws, that are familiar to us in our Solar system. The Laws our science knows are assumed to be universally valid in the cosmos although they may represent just special cases in some yet unknown world of super laws of nature.
Uniform spiritual Universe
In God's image - contemporary ideas
Avatar movie (2009)
So, considering uniformity of the Universe in scientific theories it is not such a big leap of faith to suggest that also intelligent life is uniform ín the entire Creation regardless of in which star system or particular galaxy it happens to flourish; including intelligent life forms.
Scriptures are the key here for any theological speculation and we might be surprised by the familiarity of the intelligent fellows that God has created in some corner of Andromeda Galaxy:
1. They would have some divine tasks and purpose of existence and the ability to perform the tasks in their place of living
And God said, Let us make man in our image, after our likeness: and let them have dominion over the fish of the sea, and over the birds of the heavens, and over the cattle, and over all the earth, and over every creeping thing that creepeth upon the earth. Genesis 1:26
2. They would likely be sexual - perhaps not physically like man and woman or bees and flowers, but still male female in some form.
And God created man in his own image, in the image of God created he him; male and female created he them. Genesis 1:27
3. There would indeed be good and bad, friends of God and His adversaries, even Star Wars for the God of Israel is Lord of Hosts and even in heaven there was a war!
And there was war in heaven: Michael and his angels going forth to war with the dragon; and the dragon warred and his angels; Rev 12:7
4. Because of the uniformity of universe, ET would have a universal spirit immediately recognizable to us and a feeling, loving and hating soul as the movie character ET has and there would also be intelligent life forms with soul like horses and dogs and birds and...
5. Because of the uniformity of universe, theological speculation would suggest that also other intelligent beings in the Cosmos are not be marionettes in some predestined divine play but objects of divine love and to some extent free in their personal relationship to God, their Creator. They would not be just intelligent social animals like ants in a brilliant but limited life system.
On this line of thinking we can imitate scientists and apply what we know about intelligent life here upon Earth and assume that human like beings exists all over the Cosmos. However, we can only argue on the limited experience and knowledge of human race and cannot claim that we represent all possible forms of intelligence or personality or sexuality in the huge world of God that modern Astronomy is surveying.
Drop from a bucket
Some 2500 years ago it was written in Spirit and in Hebrew - with the knowledge of God's world that existed then:
Behold, the nations are like a drop from a bucket,
And are regarded as a speck of dust on the scales;
Behold, He lifts up the islands like fine dust.
Even Lebanon is not enough to burn,
Nor its beasts enough for a burnt offering.
All the nations are as nothing before Him,
They are regarded by Him as less than nothing and meaningless.
To whom then will you liken God?
Or what likeness will you compare with Him?
As for the idol, a craftsman casts it,
A goldsmith plates it with gold,
And a silversmith fashions chains of silver.
He who is too impoverished for such an offering
Selects a tree that does not rot;
He seeks out for himself a skillful craftsman
To prepare an idol that will not totter.
Do you not know? Have you not heard?
Has it not been declared to you from the beginning?
Have you not understood from the foundations of the earth?
It is He who sits above the circle of the earth,
And its inhabitants are like grasshoppers,
Who stretches out the heavens like curtain
And spreads them out like a tent to dwell in.
Isaiah 40:15-22 NASB
Spirit of God
Some of the ETs will also have received the Spirit of God. That is true uniformity, One God in the entire Cosmos.
“THINGS WHICH EYE HAS NOT SEEN AND EAR HAS NOT HEARD,
AND which HAVE NOT ENTERED THE HEART OF MAN,
ALL THAT GOD HAS PREPARED FOR THOSE WHO LOVE HIM.”
For to us God revealed them through the Spirit; for the Spirit searches all things, even the depths of God.
For who among men knows the thoughts of a man except the spirit of the man which is in him? Even so the thoughts of God no one knows except the Spirit of God.
Now we have received, not the spirit of the world, but the Spirit who is from God, so that we may know the things freely given to us by God, which things we also speak, not in words taught by human wisdom, but in those taught by the Spirit, combining spiritual thoughts with spiritual words.
1 Corinthians 2:9-14 NASB