"Meditation is something artificially put on; it does not belong to the native activity of the mind. Upon what do the fowls of the air meditate? Upon what do the fish in the water meditate? They fly; they swim. Is not that enough?"

I'd argue that thinking about our thoughts and ourselves is a natural thing for humans to do. It's natural for birds to fly, it's natural for fish to swim, and it's natural for humans to engage in meta-cognition.