“I remember one day in August of 2003 I made the decision to become (near) vegan and that once the decision was made I felt great emotional alignment within my heart. I knew this was the right thing for me to do and I also knew that I was making a decision that I would be committed to for the rest of my life. At last my beliefs and my ethics had come into alignment.”

Interview Ken Venturi http://www.asapsports.com/show_interview.php?id=5285, Kemper Insurance Open, Potomac, Maryland. ASAP Sports - Golf, June 3, 2000.

As quoted in "Unpacking the Skinner Box : Revisiting B. F. Skinner through a Postformal Lens" by Dana Salter in The Praeger Handbook of Education and Psychology Vol. 4 (2008) edited by Joe L. Kincheloe and Raymond A. Horn, Ch. 99, p. 872.

Source: Vampire Academy

1970s, Remarks on pardoning Nixon (1974)
Context: I have come to a decision which I felt I should tell you and all of my fellow American citizens, as soon as I was certain in my own mind and in my own conscience that it is the right thing to do.
I have learned already in this office that the difficult decisions always come to this desk. I must admit that many of them do not look at all the same as the hypothetical questions that I have answered freely and perhaps too fast on previous occasions.
My customary policy is to try and get all the facts and to consider the opinions of my countrymen and to take counsel with my most valued friends. But these seldom agree, and in the end, the decision is mine. To procrastinate, to agonize, and to wait for a more favorable turn of events that may never come or more compelling external pressures that may as well be wrong as right, is itself a decision of sorts and a weak and potentially dangerous course for a President to follow.
I have promised to uphold the Constitution, to do what is right as God gives me to see the right, and to do the very best that I can for America.

Source: All the Pretty Horses

Nobel Address (1991)
Context: I have long ago made a final and irrevocable decision. Nothing and no one, no pressure, cither from the right or from the left, will make me abandon the positions of perestroika and new thinking. I do not intend to change my views or convictions. My choice is a final one.
It is my profound conviction that the problems arising in the course of our transformations can be solved solely by constitutional means. That is why I make every effort to keep this process within the confines of democracy and reforms.

Source: Mistaken

2000s, 2009, Farewell speech to the nation (January 2009)
Context: Like all who have held this office before me, I have experienced setbacks. There are things I would do differently if given the chance. Yet I have always acted with the best interests of our country in mind. I have followed my conscience and done what I thought was right. You may not agree with some tough decisions I have made. But I hope you can agree that I was willing to make the tough decisions.