“The greatest and most valuable resources we have for making crucial decision are knowledge and the amazing brainpower God gave human beings when he created us. That's certainly true for deciding our best response to any risk we ever face.”

"CARSON: Expanding our energy resources serves peace" http://www.washingtontimes.com/news/2014/mar/25/carson-energys-role-in-the-path-to-peace/, The Washington Times (March 25, 2014)

You Can Lead an Atheist to Evidence, But You Can't Make Him Think (2009)

2013, Cape Town University Address (June 2013)
Context: We always have the opportunity to choose our better history. We can always understand that most important decision -- the decision we make when we find our common humanity in one another. That’s always available to us, that choice. [... ] it can be heard in the confident voices of young people like you. It is that spirit, that innate longing for justice and equality, for freedom and solidarity -- that’s the spirit that can light the way forward. It's in you.

Finding Our Way: Leadership For an Uncertain Time (2005)

2:1
Church Dogmatics (1932–1968)

2015, State of the Union Address (January 2015)
Context: When we make rash decisions, reacting to the headlines instead of using our heads; when the first response to a challenge is to send in our military -- then we risk getting drawn into unnecessary conflicts, and neglect the broader strategy we need for a safer, more prosperous world. That’s what our enemies want us to do. I believe in a smarter kind of American leadership. We lead best when we combine military power with strong diplomacy; when we leverage our power with coalition building; when we don’t let our fears blind us to the opportunities that this new century presents. That’s exactly what we’re doing right now. And around the globe, it is making a difference. [... ] That’s how America leads -- not with bluster, but with persistent, steady resolve.

A Short History of Decay (1949)

Source: Think Big (1996), p. 212

Source: Mark Twain's Notebook (1935), p. 394.