I want to distinguish between a mission and a mission statement. I will not help you wordsmith your mission statement. I frankly don't think it matters.

But a great mission generally combines three things: 1. a long-term commitment to maximize some aspect of human flourishing (in the book I explain how this is the true definition of what it means to create a for-profit venture) 2. a set of values that include a determination to make principled decisions aligned with this goal, such that every decision the org makes is coherent 3. the strength to resist both the inner temptation and the outer pressure to defect, betray, or otherwise abandon the long-term goal

In the book I go into a lot more detail about how to do this, including how to make fiduciary commitments to the human beings you'd rather die than betray.