Frustration, although quite painful at times, is a very positive and essential part of success.

We have shown that it is possible to create a radioactivity characterized by the emission of positive or negative electrons in boron and magnesium by bombardment with alpha rays.

Long ago made it a principle of my life to cultivate a positive frame of mind, to strive to project it and to share it with those I meet. It is a principle that has served me well.

Optimists are usually wrong. But all the great change in history, positive change, was done by optimists.

I have had almost only positive experiences in Germany. I want to be very clear about that.

I hope that my first appearance at a World Cup will be marked with a positive outcome.

Over the last three years, UCLA has helped me grow as an athlete, a scholar, and a member of the community. I have made some mistakes along the way; however, I am grateful that I made those mistakes backed by such a supportive and positive university so that I could learn from them and better myself.

Earned success is the key to a positive, happy life.

Putting good energy into your body and raising your serotonin will lead to a positive mood, exuding a more attractive glow.

Both Bernie Sanders and Donald Trump have tapped into a legitimate anger about the failures of Washington, but instead of running a campaign built on a positive vision for overcoming these failures, Donald Trump has conducted a polarizing and divisive campaign.