Dumb saying
This saying seems to be popular in 'self-help' Tumblr and
Facebook sites.
"If you don't set goals for yourself, you are doomed to achieve the goals of someone else."
Or similarly:
"Build your own dreams, or someone will hire you to build theirs."
Dumb and halfway dangerous.
For the individual:
Unrealistic goals are the fastest route to failure and suicide. This saying encourages people to set unrealistic goals. If you spend half your life trying to accomplish something that is beyond your natural abilities and tendencies, you'll lose the chance to accomplish the things you were designed to do.
For society:
Civilization consists of people working for other people. It's the only way to get important things done. If everyone is trying to run his own business, nobody is available to help the useful businesses run.
In fact:
You're vastly more likely to accomplish your own
realistic dreams within the framework of an existing business or organization.