--Neal A. Maxwell, October 1995 general conference
"When you have done the best you can, be satisfied and don't look back. Rather than berate yourself for what you didn't do, congratulate yourself for what you did."
--M. Russell Ballard, October 1991 general conference
"Disobedience is essentially a prideful power struggle against someone in authority over us. It can be a parent, a priesthood leader, a teacher, or ultimately God. A proud person hates the fact that someone is above him. He thinks this lowers his positiong. God will have a humble people. Either we can choose to be humble or we can be compelled to be humble."
-- Ezra Taft Benson, April 1989 general conference
"All that the Lord requires of us is strict obedience to the laws of life. All the sacrifice that the Lord asks of his people is strict obedience to our own covenants that we have made with our God, and that is to serve him with an undivided heart."
--Brigham Young, Journal of Discourses, 18:246
And I need to add another one, that I was just reminded of:
Elder Donald L. Staheli, a member of the Seventy, said “Regardless of our age and stage in life, daily obedience to gospel principles is the only sure way to eternal happiness. President Ezra Taft Benson put it most poignantly when he said, ‘When obedience ceases to be an irritant and becomes our quest, in that moment God will endow us with power.’” (in Conference Report, Apr. 1998, 108; or Ensign, May 1998, 82 ).