Based on the answer from the Bible, Religion is worship, a way of worshipping God or a deity or serving God or a deity. It is used in the Bible in the Greek, it is called threskeia. It means religion, worshipping and ceremonial observance. Now, the Bible tells us or teaches us a true religion or true worship or true service to God.
Let us read the book of James 1:26 “If anyone thinks he is religious, and does not bridle his tongues but deceives his heart, this man's religion is vain.” Now, you have to note that if you are indulged in religion, but you did not train your tongue, the way you speak, you speak carelessly, you speak hatred, you speak bad things against people, then your religion is nothing, is vain. Meaning that there is a good religion and there is religion that is vain. And the true religion is taught, the true worship, the true service of God, is taught in the church of God in the Bible.
Let us read in the book of 1st Timothy 3:15: “ for some have already strayed after satan” There is a true church in the Bible, the church of God. Now, in the true Church in the Bible, men are instructed the things that they must do. That's why the apostle Paul says, or in the church of God. All the teachings on how to behave, how to worship, how to walk, how to deal with people,all those things are in the church of God of the Bible.
Remember that religion is worshipping God. And how do we worship God? It is clear the religion being taught in the church of God is to worship the Father or God in spirit and in truth. That is true worship, to worship God in spirit and in truth, and that consists of the true religion.
If you worship an animal or a bird or snake, you are worshipping a false God, not the true God of the Bible. And if that is the kind of worshipping you are doing, that is something against God, which God hates, something very evil in the sight of God. We must worship the creator, not the creature. Anyone who worships a false God belongs to a false or erroneous religion. Because the true religion or true worship is to worship only the creator which is God.
Thanks for reading.