These quotes are from The Crux.

One:

Too many people start with goals and other visions of a desired end state. Start with the challenge, and diagnose its structure and forces at work. […] In that diagnosis find the crux, That is the most critical part of the challenge that you can actually expect to solve.

Two:

[…] Understand the sources of power and leverage that are relevant to your situation.

Three:

[…] Avoid the bright, and shiny distractions that abound. Don’t confuse management tools (mission, and vision statements) with strategy,

Four:

By starting with the challenge, and avoiding a too rapid coverage on action, a group can define the crux and design coherent actions to overcome it.