Do you find it interesting as I do that people who do not want to honor or follow God, suddenly want to blame Him for things when their lives fall apart? I've run into people who have no use for God until they need someone to blame when problems come into their lives. So, why should I be shocked when God's book or wisdom tells me the very same thing.
The foolishness of man is what ruins his way. This word means to be silly and foolish - to be perverse. The fool does not want wisdom or understanding - usually the fool wants a good time - regardless of the cost. The fool wants to do his own thing, and if his own thing is contrary to God's will, that's too bad. The rest of the proverbs tells us about the fool - he is quick-tempered, lacks sense, and deceitful. He is naive and often repeats the same evil again and again, never learning from the experience. You can easily see why the foolishness of the fool leads to the ruin of his way. When you live and make decisions contrary to the Word of God, you will wind up with a mess in your life.
It would be one thing for the fool to experience these things and learn from them, but if you remember correctly, the fool does not learn. Here we read that the fool's heart rages aainst Jehovah when these things happen. The word "rage" actually speaks of a storm raging. What happens is that the fool has a storm raging on the inside of him - a storm that exhibits itself as rage to the outside world. In the midst of experiencing the fruit of his way - the consequences of his actions, the fool has a hurricane building on the inside. That raging storm manifests itself outwardly when the fool rages against God. Besides, He is the One Who put such consequences into place. He is the One Who made it where acting a certain way brings a certain result. Or the fool rages against God's Law and commandments. He rages that God has given such things - making them so intractable.
It just blows my mind that all this rage explodes against God - and yet they don't acknowledge Him until that moment. One would think it strange to ignore and deny the existance of Someone until the eternal nature of His law manifests itself in the myriad of consequences that are coming upon them. But then again that is the MO of the fool. He lives for his foolishness - never taking thought of God's Law or ways - until those ways come crashing down upon them as the consequences of their actions.