What happened when Jane was considering Mr st johns proposal?

"Do not let us forget that this is a solemn matter," he said ere long: "one of which we may neither think nor talk lightly without sin. I trust, Jane, you are in earnest when you say you will serve your heart to God: it is all I want. Once wrench your heart from man, and fix it on your Maker, the advancement of that Maker's spiritual kingdom on earth will be your chief delight and endeavor; you will be ready to do at once whatever furthers that end. You will see what impetus would be given to your efforts and mine by our physical and mental union in marriage: the only union that gives a character of permanent conformity to the destinies and designs of human beings; and, passing over all minor caprices-all trivial difficulties and delicacies of feeling-all scruple about the degree, kind, strength or tenderness of mere personal inclination- you will hasten to enter into that union at once."