What’s the best way to set goals?

Ray Dalio (Chairman and Chief Investment Officer at Bridgewater Associates)
Principles

Great expectations create great capabilities. Don’t rule out a goal due to a superficial assessment of its attainability. Once you commit to a goal, it might take lots of thinking and many revisions to your plan over a considerable time period in order to finalize the design and do the tasks to achieve it. So you need to set goals without yet assessing whether or not you can achieve them.