"As a man thinketh" and Proverbs 23:7

One thing I really hate is when people misquote and twist scripture to mean something it never said. (Now some people do this in ignorance, but some do it knowingly.) When someone does that, that person is perverting the word of God, which is a very dangerous thing to do. So, when I hear someone say "As a man thinketh in his heart, so is he," it makes my teeth grind. What's wrong with that statement? It is not in the Bible! That is Proverbs 23:7, misquoted. The actual verse, in context, reads:

 Proverbs 23: 1 When thou sittest to eat with a ruler, consider diligently what is before thee: 2 And put a knife to thy throat, if thou be a man given to appetite. 3 Be not desirous of his dainties: for they are deceitful meat. 4 Labour not to be rich: cease from thine own wisdom. 5 Wilt thou set thine eyes upon that which is not? for riches certainly make themselves wings; they fly away as an eagle toward heaven. 6 Eat thou not the bread of him that hath an evil eye, neither desire thou his dainty meats: For as he thinketh in his heart, so is he: Eat and drink, saith he to thee; but his heart is not with thee. 8 The morsel which thou hast eaten shalt thou vomit up, and lose thy sweet words.

See the difference? This verse is widely misquoted to support "Positive Thinking", but it clearly has nothing to do with that at all. Okay, so maybe it reads differently in another translation, right? Nope, I checked on that. There is no Bible translation that reads "as a man", or even one that could be construed to mean it that way. But you don't have to take my word for it, check yourself. Here is a page at BibleGateway comparing that verse across every english translation that they have.
https://www.biblegateway.com/verse/en/Proverbs%2023:7

Dave Hunt does a great job of explaining this verse in this short clip taken from an interview.

Also, here is a short article I found explaining this issue quite well:

"What can we know about the meaning of this verse when we consider the context? First, we have to make sure that the verse is quoted correctly. Instead of saying “As a man…” the verse says “As he …” (emphasis added). Second, it is essential that we pay close attention to the antecedents of the pronouns that verses contain. Sometimes the antecedent is clear within a given verse. Other times we have to look to the surrounding verses to know the antecedent. With Proverbs 23:7 we have to ask ourselves “Who is the ‘he’ to whom the verse is referring?” Consider the entire passage that captures the complete thought in vv. 6-8. “Do not eat the bread of a miser, nor desire his delicacies; for as he thinks in his heart, so is he. ‘Eat and drink!’ he says to you, but his heart is not with you. The morsel you have eaten, you will vomit up, and waste your pleasant words.” From the context we can see that the writer is warning the reader to be aware of those who might feign hospitality and friendliness toward you. Don’t be fooled by their insincere kindness. Their flattering actions actually hide how they really are disposed toward you. Here the miser resents the fact that you are eating his food despite the fact that he offered the food to you in the first place. It is how the miser is thinking in his heart that reveals the truth about his disposition of animosity toward you. Don’t be so naïve as to think that every kind word issues from a trustworthy friend."

Brethren, let us not be careless in our use of the Scriptures. Context, context, context.