We were made with the ability to think like God does, to feel what God feels, and to make choices that can change the world like God does - although our choices are made on a smaller scale than His.
The Bible tells us this in Genesis chapter 1 verses 26 through 27, which says this in the English Standard Version of the Bible:
"Then 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 livestock and over all the earth and over every creeping thing that creeps on the earth." So God created man in his own image, in the image of God he created him, male and female he created them."
From there, the Christian faith begins sharing a version of human history that is full of broken lives and shattered dreams because we decided we did not need God. We tend to believe that our lives can be better off without Him.
The end result of that way of thinking on our part has been described in the Bible by Psalms chapter 53 verses 2 through 3 which say this in the English Standard Version of the Bible:
"God looks down from heaven on the children of man to see if there are any who understand, who seek after God. They have all fallen away; together they have become corrupt; there is none who does good, not even one."
So before Jesus Christ came, God began working to convince people that we were made in God's image, and that we are no longer a pure reflection of God's image. All of the work God did in the past to convince people of these two things took place among a very specific group of people who today are called the Israelis.
So in order to be a Christian, you have to believe that we were created in the image of God, and that image has been corrupted by what God considers to be evil. Anyone who does not hold to these two ideas will not be recognized by God as a Christian. This is the whole point of what is commonly called the Old Testament, and is the environment in which the Gospel of Jesus Christ can be shared correctly.
For I delivered to you as of first importance what I also received: that Christ died for our sins in accordance with the scriptures, and that he appeared to Cephas, then to the twelve. Then he appeared to more than five hundred brothers at one time, most of whom are still alive, though some have fallen asleep. Then he appeared to James, then to all the apostles,. Last of all, as to one untimely born, he appeared also to me."