Charles F. Kettering
A problem well stated is a problem half solved.
Keep on going and the chances are you will stumble on something, perhaps when you are least expecting it. I have never heard of anyone stumbling on something sitting down.
My interest is in the future because I am going to spend the rest of my life there.
Our imagination is the only limit to what we can hope to have in the future.
Where there is an open mind there will always be a frontier.