The guy who takes a chance, who walks the line between the known and unknown, who is unafraid of failure, will succeed.
— Gordon Parks
Authentic Unknown Motivational quotations
Some succeed because they are destined to, but most succeed because they are determined to.

Don't wait for your ship to come in, swim out and meet the bloody thing.

I'm in a wonderful position: I'm unknown, I'm underrated, and there's nowhere to go but up.
Don't wait for your ship to come in, swim out to it.
Decide that you are not going to stay where you are.

Silence is sometimes the best answer
If you can't stop thinking about it, don't stop working on it.
Be Somebody who makes Everybody feel like a Somebody.

Replace fear of the unknown with curiosity.
When you put yourself on the line in a race and expose yourself to the unknown, you learn things about yourself that are very exciting.
Everyone who comes within the reach of your knowledge is, as it were, on trial in your mind. It is easy to be an unjust, ignorant, and even a merciless judge. The real character of the actions of others depends in great measure on the motives that prompt them, and these motives are unknown to you.

Success is an act of exploration. That means the first thing you have to find is the unknown. Learning is searching; anything else is just waiting.
Don’t wait for the perfect moment. Take the moment and make it perfect!
Move from the known to the unknown.

The ability to know that your perceptions are accurate has to happen without others' validation. Intuition is not the result of diet, rituals, or wind chimes. It's the natural consequence of having self-esteem, the greatest power you can have. With self-esteem, your life can broaden into an adventure because you can know in your gut that you can handle the unknown. And you can handle helping others without fear, which is true liberation.
It is this breathtaking image [of] success that motivates us and motivates kids to follow and understand rocket science: to understand the importance of physics and math and, in many ways, to have that awe at exploration of the frontiers of the unknown.
For, besides, that many persons find too sensible an interest in perpetually recalling such topics; besides this, I say, the motive of blind despair can never reasonably have place in the sciences; since, however unsuccessful former attempts may have proved, there is still room to hope, that the industry, good fortune, or improved sagacity of succeeding generations may reach discoveries unknown to former ages.

Great motivators are visible at the front and lead by their actions.
Hiding in your office or mysteriously traveling all the time on unknown missions are sure ways to cause the focus of your team to disperse.
The deduction of effect from cause is often blocked by some insuperable extrinsic obstacle: the true causes may be quite unknown. Nowhere in life is this so common as in war, where the facts are seldom fully known and the underlying motives even less so.
A true religion will have the humbleness to admit that only a few things are known, much more is unknown, and something will always remain unknowable. That 'something' is the target of the whole spiritual search. You cannot make it an object of knowledge, but you can experience it, you can drink of it, you can have the taste of it - it is existential.

Ardent desire for knowledge, in fact, is the one motive attracting and supporting investigators in their efforts; and just this knowledge, really grasped and yet always flying before them, becomes at once their sole torment and their sole happiness. Those who do not know the torment of the unknown cannot have the joy of discovery which is certainly the liveliest that the mind of man can ever feel.
Improvisation is empowering because it welcomes the unknown.
And since what's impossible is always unknown, it allows me to believe I can cheat the impossible.
As they were during the Cold War, urban population centers remain the most likely targets of a nuclear attack. Now, however, an attack may come without warning from an unknown enemy, to achieve unclear motives.

Why do people persist in a dissatisfying relationship, unwilling either to work toward solutions or end it and move on? It's because they know changing will lead to the unknown, and most people believe that the unknown will be much more painful than what they're already experiencing.
It is this belief in a power larger than myself and other than myself which allows me to venture into the unknown and even the unknowable.