A country without constitution is a country without laws, is anarchy.
The Bible is God’s constitution, for everyone in the world.
It’s not acceptable that He created the world and man and throws them in a world without laws. Imagine a father doing that with his son? Children’s education is divided into several age stages. So God started talking to Adam, Noah, Abraham and Moses gave the law, an eye for an eye a tooth for a tooth, blessing or curse, richness or poorness, heaven or hell was here.
the great problem in accepting a Lamb who gave an example of life and promises heaven only after death. God started to demand the fulfillment of the laws trough the prophets, as confirmed in Hebrews 1-
1- God, who at sundry times and in divers manners spake in time past unto the fathers by the prophets,
2- Hath in these last days spoken unto us by [his] Son, whom he hath appointed heir of all things, by whom also he made the worlds;

Jesus says that the word belongs to the father and she’ll judge. Jonh12-
48- He that rejecteth me, and receiveth not my words, hath one that judgeth him: the word that I have spoken, the same shall judge him in the last day.
49- For I have not spoken of myself; but the Father which sent me, he gave me a commandment, what I should say, and what I should speak.
And in John 8:
32- And ye shall know the truth, and the truth shall make you free.
And says in the prayer for us: John 17:
17- Sanctify them through thy truth: thy word is truth.
18- As thou hast sent me into the world, even so have I also sent them into the world.
19- And for their sakes I sanctify myself, that they also might be sanctified through the truth.
20- Neither pray I for these alone, but for them also which shall believe on me through their word;