“Grace is something you can never get but only be given.”
Beyond Words: Daily Readings in the ABC's of Faith (1979)
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Frederick Buechner 67
Poet, novelist, short story writer, theologian 1926Related quotes
Source: Plan B: Further Thoughts on Faith

Statement published in A Year of Beautiful Thoughts (1902) by Jeanie Ashley Bates Greenough, p. 172, Third statement for June 11. This has often been misattributed to Helen Keller in some published works since at least 1980, perhaps because she somewhere quoted it.
Variant:
I am only one,
But still I am one.
I cannot do everything,
But still I can do something;
And because I cannot do everything,
I will not refuse to do the something that I can do.
The Book of Good Cheer : A Little Bundle of Cheery Thoughts (1909) by Edwin Osgood Grover, p. 28; also in Masterpieces of Religious Verse (1948) by James Dalton Morrison, p. 416, where it is titled "Lend a Hand"

“You only need a heart full of grace, a soul generated by love. And you can be that servant.”
1960s, The Drum Major Instinct (1968)
Context: And so Jesus gave us a new norm of greatness. If you want to be important—wonderful. If you want to be recognized—wonderful. If you want to be great—wonderful. But recognize that he who is greatest among you shall be your servant. That's a new definition of greatness. And this morning, the thing that I like about it: by giving that definition of greatness, it means that everybody can be great, (Everybody) because everybody can serve. You don't have to have a college degree to serve. You don't have to make your subject and your verb agree to serve. You don't have to know about Plato and Aristotle to serve. You don't have to know Einstein's theory of relativity to serve. You don't have to know the second theory of thermodynamics in physics to serve. You only need a heart full of grace, a soul generated by love. And you can be that servant.
As quoted in "Interview: Why Is Maurice Sendak So Incredibly Angry?" by Leonard S. Marcus in Parenting (October 1993); also in Ways of Telling : Conversations on the Art of the Picture Book (2002) by Leonard S. Marcus, p. 181

Eric Schmidt: 'Playing catch-up with the competition will never help you create something new' http://macdailynews.com/2014/08/27/eric-schmidt-playing-catch-up-with-the-competition-will-never-help-you-create-something-new in MacDailyNews (28 August 2014).