For we have always understood that when times change, so must we, that fidelity to our founding principles requires new responses to new challenges, that preserving our individual freedoms ultimately requires collective action.
If the imagination is to transcend and transform experience it has to question, to challenge, to conceive of alternatives, perhaps to the very life you are living at the moment.
So long as I'm the president, we will. I clearly see the challenge. I see the challenge of what these threats pose to our homeland, and I see the challenge of what these threats pose to the world.
Whenever I look at the history of presidents I deeply admire - the one thing that I'm always struck by is persistence. It's a quality that's underrated. Being able to plough through, being able to stay buoyant in the face of challenges.
Difficulties and obstacles are God's challenges to faith. When hindrances confront us in the path of duty, we are to recognize them as vessels for faith to fill with the fullness and all-sufficiency of Jesus.
My dad challenged every president from President [Dwight] Eisenhower and Vice President [Richard] Nixon to President [J.F] Kennedy, Vice President [Lindon] Johnson to President Johnson and Vice President [Hubert] Humphrey. It`s challenging the administrations to do the right thing.
Today I challenge our nation to commit to producing 100 percent of our electricity from renewable energy and truly clean carbon-free sources within 10 years.
The truth is that America has been closely divided politically for quite some time. That was reflected in some of the challenges I had with the Republican Congress.
For we have always understood that when times change, so must we, that fidelity to our founding principles requires new responses to new challenges, that preserving our individual freedoms ultimately requires collective action.
We live in changing times, and many people experience the challenges that come with it. In the face of uncertain futures, no one will know what to expect.
Science is based on experiment, on a willingness to challenge old dogma, on an openness to see the universe as it really is. Accordingly, science sometimes requires courage - at the very least the courage to question the conventional wisdom.