People really do think they have to choose between high stress and high reward jobs, and low stress and low reward jobs.

Changing the world doesn't require much money. Again, think in terms of empowerment and not charity. How much were Gandhi's teachers paid? How much did it cost to give Dr. Martin Luther King the books that catalyzed his mind and actions?

For all of the most important things, the timing always sucks. Waiting for a good time to quit your job? The stars will never align and the traffic lights of life will never all be green at the same time. The universe doesn't conspire against you, but it doesn't go out of its way to line up the pins either. Conditions are never perfect. "Someday" is a disease that will take your dreams to the grave with you. Pro and con lists are just as bad. If it's important to you and you want to do it "eventually," just do it and correct course along the way.

Lack of time is actually lack of priorities.

You can enjoy stargazing just by going out and learning a couple constellations with your kids.

One of the bigger misconceptions of learning is that many skills take a lifetime to get world-class at, or 10,000 hours to become world-class at.

Uncertainty and the prospect of failure can be very scary noises in the shadows. Most people will choose unhappiness over uncertainty.