Understanding the difference between Vision, Mission, Values & Goals

On my previous leadership post I said if leadership is about anything then it's about achieving a vision. But what do we mean by vision, and what about mission, values and goals?

I think it may be helpful to define what is normally meant by these terms.

Mission (you can also use the word Purpose)
Dictionary definition – a person’s vocation, his mission in life
Mission answers the question “Why do we exist?”

Vision
Dictionary definition – something seen in the imagination or in a dream
Should answer the question “Where are we going?”
A vision statement must have a destination otherwise it is just a purpose\mission statement.

Values
The way we do things here – culture, ethos – our distinctiveness
What we believe in shapes our values, our values shape our behaviour.

Goals
These should annual plans that help you move towards your vision in bite-sized chunks
They should be achieveable but challenging.
You could have annual, 2-3 year or 5-10 year goals, it all depends on the long term nature of your vision.