"Diligence is steady, consistent, earnest, and energetic effort in doing the Lord’s work. The Lord expects you to work diligently—persistently and with great effort and care. A diligent missionary works effectively and efficiently. Diligence in missionary work is an expression of your love for the Lord and His work. When you are diligent, you find joy and satisfaction in your work.
"Do many good things of your own free will (see D&C 58:27). Don’t wait for your leaders to tell you what to do. Continue until you have done all you can, even when you are tired. Focus on the most important things and avoid wasting time. Pray for guidance and strength. Plan regularly and effectively. Avoid anything that distracts your thoughts or actions."
Consider this quote from President Spencer W. Kimball, given back in 1979:
"One of the great teachings of the Man of Galilee, the Lord Jesus Christ, was that you and I carry within us immense possibilities. In urging us to be perfect as our Father in Heaven is perfect, Jesus was not taunting us or teasing us. He was telling us a powerful truth about our possibilities and about our potential. It is a truth almost too stunning to contemplate. Jesus, who could not lie, sought to beckon us to move further along the pathway to perfection.
"We are not yet perfect as Jesus was, but unless those about us can see us striving and improving, they will not be able to look to us for example, and they will see us as less than fully serious about the things to be done.
"Each of us has more opportunities to do good and to be good than we ever use. These opportunities lie all around us. Whatever the size of our present circle of effective influence, if we were to improve our performance even a little bit, that circle would be enlarged. There are many individuals waiting to be touched and loved if we care enough to improve in our performance.
"We must remember that those mortals we meet in parking lots, offices, elevators, and elsewhere are that portion of mankind God has given us to love and to serve. It will do us little good to speak of the general brotherhood of mankind if we cannot regard those who are all around us as to our brothers and sisters. If our sample of humanity seems unglamorous or so very small, we need to remember the parable Jesus gave us in which he reminded us that greatness is not always a matter of size or scale, but of the quality of one’s life. If we do well with our talents and with the opportunities around us, this will not go unnoticed by God. And to those who do well with the opportunities given them, even more will be given!" (emphasis added)
My impression is this: If we remember that we are children of God and disciples of Christ, both of whom love us immeasurably, and that we therefore have a natural vested interest in one another, then diligence ceases to be an irritant and becomes a blessing.