Every business and every product has risks. You can't get around it.
Formal learning can teach you a great deal, but many of the essential skills in life are the ones you have to develop on your own.
If we wait until we've satisfied all the uncertainties, it may be too late.
The trick is to make sure you don't die waiting for prosperity to come.
To solve big problems you have to be willing to do unpopular things.
What is it that you like doing? If you don't like it, get out of it, because you'll be lousy at it. You don't have to stay with a job for the rest of your life, because if you don't like it you'll never be successful in it.