rhetorics and logic

My understanding of rhetorics and logic, after reading the articles is that they are similar in that they both deal with persuasive speach but I think that they are completely opposite. I hope that I am on the right track but what I got from the articles is that rhetorics is a way of being persuasive in speach eg. politics, advertising, etc... and logic is a way of recognising persuasive speach. I think that this is the relationship between the two. Rhetorics first uses a logical phrase and the changes the words, using the same phrase to make it more persuasive for whatever purpose. Logic is a way of looking at a rhetorical phrase and picking it a part to figure out what it actually means, not what one may be initially tricked into thinking it means. I think that defining logic as "The Laws Of Thought" is a little too much. I think that it may be an area of thought but not every thought one has is logical and some thoughts don't have anything to do with logic.