The Book of Genesis tells the origins of Skies and the Earth, the beginning of human life in a perfect world and the entrance of sin. It speaks also about the plan of salvation and the judgment about sin and sinners. Genesis begins with the narrative sublime one of a symmetrical and perfect creation from the hands of the Creator. God not only creates, but shares with humans the creations he attributes. By creating human beings in his image, God granted humans the creation of the gift of procreating and commissioned them in the care and preservation of it.

After the two first chapters describing a perfect creation, we are confronted with the story of the temptation and fall of our first parents. The tragic consequences of the fall, however, were not limited to the expulsion of the garden. Soon after that, the first homicide occurred, when Cain killed his brother Abel. Some genealogies are followed that, with monotonous repetition, inform the reader that the antediluvian patriarchs, for more long they lived , had finally died - Unquestionable evidence of the final consequence of the sin. The natural death of each living being, however, was not sufficient for stopping of the propagation of sin. The corruption of the s human species was reached so deep that the proper Creator was sad for having created the human being and, finally, sent The Big Flood to punish the rebellion of the creatures The history of the Diluvium, follows the story of the Tower of Babel, demonstrating that the Diluvium did not extinguish sin. The Ark that also preserved the life of animals and human beings preserved the sin in the heart of these last ones. And, by coming across with the patriarchal narratives of Abraham, Isaque, Jacob and his children, we perceive weaknesses in the character of these patriarchs demonstrated in acts of incredulity, jealousy and lies.

However, amid this confusion of problems, reveals a God of love, that in each moment of infringement shows his grace upon mitigating the consequences of the sin with a promise or act. To the first couple, God promised the “seed of the woman” that would crush the head of the snake. Amid the inexorable refrain of that everybody died, there is a marvelous exception: “walked Enoch with God and God took him” (Gn 5:22). Amid the decadence and of corruption world antediluvian, God finds a good and fair man and, through Him , makes a universal concert with the race of human beings, promising that the land never more will be destroyed by water.

After the diluvium, God chooses Abraham for, through him, and blesses all the families of the earth. Although Abraham and his descendants manifested serious weaknesses of character, God graciously led them and preserved their lives, to the point of making in good the evil that they intended to do (Gen 50:20). So, the God who called Abraham and preserved the life of his descendants was not a local divinity, but the Creator of the Universe. The succession of catastrophes, what humanity had suffered previously explains why the choice of Abraham was necessary. After all, he will be subject to the promises made to Abraham and his descendants that will comply the purposes of God with humanity.