Matthew 5:43-48

43. Ye have heard that it hath been said, Thou shalt love thy neighbor, and hate thine enemy.
44. But I say unto you, Love your enemies, bless them that curse you, do good to them that hate you, and pray for them which despitefully use you, and persecute you;
45. That ye may be the children of your Father which is in heaven: For he maketh his sun to rise on the evil and on the good, and sendeth rain on the just and on the unjust.
46. For if ye love them which love you, what reward have ye? do not even the publicans the same?
47. And if ye salute your brethren only, what do ye more than others? do not even the publicans so?
48. Be ye therefore perfect, even as your Father which is in heaven is perfect.

"Father Where Shall I Work Today" - Meade MacGuire

"Father, where shall I work today?"
And my love flowed warm and free.
Then he pointed out a tiny spot
and said, "Tend that for me."
I answered quickly, "Oh no, not that!
Why, no one would ever see,
No matter how well my work was done.
Not that little place for me."
And the word he spoke, it was not stern;
He answered me tenderly:
"Ah, little one, search that heart of thine;
Art thou working for them or for me?
Nazareth was a little place,
And so was Galilee."

Spencer W. Kimball (Ch 1 Teachings of Presidents of the Church)

The Lord will not translate one's good hopes and desires and intentions into works. Each of us must do that for himself. (He changed his motto from "Do it" to "Do it now" to emphasize the importance of avoiding procrastination.)

Ezra Taft Benson (Preach My Gospel p.121 [1988])

I have often said one of the greatest secrets of missionary work is work! If a missionary works, he will get the spirit; if he gets the spirit, he will teach by the spirit; and if he teaches by the spirit, he will touch the hearts of the people and he will be happy. There will be no homesickness, no worrying about families, for all time talents and interests are centered on the work of the ministry. Work, work, work--there is no satisfactory substitute, especially in missionary work.

Jeremiah 20:9

9. Then I said, I will not make mention of him, nor speak in his name anymore. But his word was in mine heart as a burning fire shut up in my bones, and I was weary with forebearing, and I could not stay.

D&C 64:33-34

33. Wherefore, be not weary in well doing, for ye are laying the foundation of a great work. And out of small things proceedeth that which is great.
34. Behold, the Lord requireth the heart and a willing mind; and the willing and obedient shall eat the good of the land of Zion in these last days.

Quentin L. Cook (October 2007 Conference)

The overwhelming feeling that I have in receiving this call is that we must live by faith and not by fear.