Rich men are usually slow to share their wealth, but foolish men never need much motivation to share their opinions. One might think I'm being a bit too harsh here, but actually, "fool" is the term the Bible uses to describe those who talk too much, particularly about issues they don't understand.
In the image to the left, we have an excellent example. A man came to my page, and expressed his opinion that my post was full of "too much heresy". Here's the problem: He admits he didn't even read it. Given that he did not read it, he could not have known it was full of heresy. Now, I have no problem with people disagreeing with me. My ministry is not set up with my own pride in mind, I don't even use my real name here. None of Bible Brain's glory goes to me. I also strongly encourage people to at the very least be sceptical of my claims, since the Bible tells us to test all things (Acts 17:11; 1 Thessalonians 5:21; 1 John 4:1), so if I'm wrong, I want you to disagree with me (then tell me, because if I'm wrong, I want to change, too).
But the very point of testing all things requires you to put something to some kind of test. But in this case, the commenter had not put it to any kind of test. He simply saw that it contradicted his firmly held view, then rushed to express his disagreement with it. It is fair, then, to describe him as a fool. He doesn't care if he's wrong. Even if he were right, his attitude to being right would still be foolish.
The point of this article isn't to bash this particular individual, or others like him. The point is to encourage everyone who reads this article (and everyone who didn't read it, but will comment anyway) to take pleasure in understanding, not merely in expressing your own opinion. First, make sure your opinion is right. Second, be willing to change your opinion if it turns out it's wrong. Third, whether you're right, or your opponents are wrong, be wise in the way you express that.