A vision is an image of the future we wish to create. The future is not limited to one possible result—your imagination can create vast possibilities that have not yet been considered.
Don’t limit your ideas by worrying if they are too far-fetched or improbable—we never know what’s possible until we try.
Here’s an excerpt about possibility thinking from Chuck Gallozzi's How far is far; how high is high? We'll never know until we try:
What we often call "impossible" is merely something we have yet to try. How do we know what we can do, or not do, unless we try? By looking for possibilities and trying new things, we break free from our limitations and discover our own power. The following, which was written in 1730 in a church in England, is worthwhile pondering: "A vision without a task is but a dream. A task without a vision is drudgery. A vision and a task is the hope of the world."
The first step in discovering a new possibility is to search for it . . . The reward for seeking is discovery. Remember, as Sophocles (BC 495 - 406) taught, "What is unsought will go undetected." After opening our eyes to new possibilities, we need to act . . . Often, the only difference between the "possible" and the "impossible" is persistence. That is, what we call "impossible" to achieve is merely something we gave up on.