Don't take anything I say to seriously.

This phrase, or one very much like it, appeared in preface to a written proposal (as in, a written proposal of marriage) by my now husband in early 1992.

What's wrong with this writing?  Yes, it should be too seriously.

What's right with this writing?  It and the proposal in which it appeared served the purpose and pleased the audience.

While we should strive to make our writing as error free as possible,  the power of a text lies in the right message that connects well with our readers.