I can remember learning that lesson too.
And a wise old saint said to me..."It wasn't what you said it was how you said it. We can often have the word of the Lord, but that must be delivered in the Spirit of the Lord. The word without the Spirit = hot empty air."
After that I was slower in saying something before checking if the Lord was really directing me to say it!!
Even now I can still miss it big time if I am too hasty. LOL
There have been a number of times when I began to say something to a group of people, and could see that nobody was going to be able to receive what I was saying because it was without the spirit so I would just cut it short. Someone else would usually be able to say the exact same thing with the spirit, and it would be received.
The Spirit is able to move in those who can receive God's gifts. I'm afraid my problem is that I don't spend enough time putting myself in a position to receive God's gifts. I spend too much time fretting over the cares of the world. Instead of seeing what God would have me do, I'm thinking about what I want to do.
People walk all over us and after we've gotten packed down enough, people start using us as a freeway. The gospel still comes flying over us like bees looking for flowers to pollinate, but they just end up spattered across all those windshields.
Somehow, God gets through, and we start getting pot holes, and eventually it all starts to crumble and get broken up which as painful as it may seem is usually the only way anything can start to grow. The world beats us up, and we become fertile soil for the gospel to be implanted in us.
The world wants us dead, and when we begin to want to die ourselves, God hands us the gift of repentance. What the world means for evil, God uses for his purposes. So even though our self will may get us into a lot of trouble, God uses it to turn us back to him. The dice of God are always loaded.