I think up new inventions every day but rarely do they survive the mental scrutiny of rational thought.

On lifehacker, Jim Carrey puts it another way:

In a recent commencement address at the Maharishi University of Management, actor and comedian Jim Carrey spoke about failure, fear, and why you should pursue something that you love.

Failure is necessary and how you learn to get better, Carrey reminds you that failure is not exclusive to your dreams:

So many of us chose our path out of fear disguised as practicality. What we really want seems impossibly out of reach and ridiculous to expect so we never dare to ask the universe for it. I’m saying: I’m the proof that you can ask the universe for it.

My father could have been a great comedian but he didn’t believe that was possible for him. So he made a conservative choice. Instead, he got a safe job as an accountant and when I was 12 years old, he was let go from that safe job and our family had to do whatever we could to survive.

I learned many great lessons from my father. Not the least of which was that you can fail at what you don’t want, so you might as well take a chance on doing what you love.