According to the preamble where is the source of authority for the new constitution?

The answer is: The people

Before the preamble exist, the source of authority is placed on the government. The citizens have no right to influence the type of legislation that the government can and cannot pass.

After the preamble, the government are held accountable to fulfill the will of the people. The people were given the power  to determine the person who can work within the government body and the type of legislation that need to be made by the congress.

the language of nature was a manifestation from god as he said "let there be light" and there was light the world began to assume visible, comprehensible form.

what ever we know now think of the old vision of creation we can be sure that with out the speaking of word -without language- we would have no science today with its striking power to illuminate the world.