When Do We Become Wise?

"I guess when you're a baby you can hear God, but then when you know everything, you can't hear Him anymore."
This little gem of a thought came from my almost 6-year-old little boy. He blurts out these things in quiet moments. It's amazing what goes through a child's mind. I love hearing his perspective on the world.
He also told me, "When you try so hard, that's when you get into trouble."
Wow.
He told me a few years ago that he was in Heaven with God first, then he was born here. He still talks about when he was in Heaven.
My mother passed away in December. He loves to talk about her, and one day I said something reminded me of her, and it made me a little sad.
"Why?" he asked. "Mom, she's fine."
He has a friend across the street who is mean sometimes. One day he was telling me about some of the mean things the friend had done and said to him. I listened as he told me all of those things. I made some comment like, "Wow, that doesn't sound very nice."
"I just have to remember that God loves me," he said, "and He loves him too."