“The best ideas are common property.”
Everything that is truly important in life came to us free of charge... your mind, your body, your family, your friends, your soul, your character, your thoughts. Sometimes we human beings have a tendency to place way too little value on those things in life that are free, despite the fact that they are the most important facets of our lives.
This partially explains why we only use about 10% of our brains. Our minds are where everything important in our lives starts and ends, yet often we place more value upon that which we have to pay for. Things that we pay money for like personal possessions tend to have a certain price tag and value attached, but the really important things in life are truly priceless!