Question

"among many morals which press upon us from the poor minister's miserable experience, we put only this into a sentence:- 'be true! be true! be true! show freely to the world, if not your worst, yet some trait whereby the worst may be inferred!'"

Answer 1

The excerpt above is the original text of the scarlet letter.
If this excerpt is to be converted into modern text, it will look pretty much like this:
Among many morals that I could draw from the tale, I choose this: “Be true! Be true! If you will not show the world your worst, at least show some quality that suggests to others the worst in you!”