Following is a smattering (read: barely organized pile) of quotes that I value.

I’ll try to avoid the two great “quotation sins” as I see them:
(1) violating a quote’s context, and
(2) attributing it to Mark Twain.

You’re free to suggest corrections on the ones that lack decent source citations.

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Christian Theology & Ministry

Therefore, if anyone is in Christ, he is a new creation. The old has passed away; behold, the new has come. All this is from God, who through Christ reconciled us to himself and gave us the ministry of reconciliation; that is, in Christ God was reconciling the world to himself, not counting their trespasses against them, and entrusting to us the message of reconciliation. Therefore, we are ambassadors for Christ, God making his appeal through us. We implore you on behalf of Christ, be reconciled to God! For our sake he made him to be sin who knew no sin, so that in him we might become the righteousness of God.
(2nd Corinthians 5:17-21, ESV)

The wise man […] knows that the sluggard is no freak, but, as often as not, an ordinary man who has made too many excuses…”
–Dr. Derek Kidner, “Proverbs” (IVP 1964)

“…Once we understand that Christianity is true to what is there, true to the ultimate environment–the infinite, personal God who is really there–then our minds are freed. We can pursue any question and can be sure that we will not fall off the face of the earth.”
–Francis Schaeffer, Art and the Bible, p 17.

“I have taken my good deeds and bad deeds and thrown them together in
a heap and fled from them both to Christ, and in him I have peace.”
–David Dickson (1583-1662)

“No reserves. No retreats. No regrets.”
–William Borden

“My memory is nearly gone, but I remember two things — that I am a great sinner, and that Christ is a great Saviour.”
–John Newton

“…the most portentous fact about any man is not what he at a given time may say or do, but what he in his deep heart conceives God to be like.”
–A.W. Tozer

“I thank Thee, uncreated Sun, that Thy bright beams on me have shined;
I thank Thee, who hath overthrown my foes and healed my wounded mind;
I thank Thee, whose enlivening voice bids my freed heart in Thee rejoice.”
Sheffler/trans. by Wesley

Earth’s crammed with heaven,
And every common bush afire with God:
But only he who sees takes off his shoes;
The rest sit around it and pluck blackberries…
–Elizabeth Barrett Browning, 1857

“When you stand in the pulpit tonight, you can do one of two things. Either you can show those in the congregation that Jesus Christ is wonderful, or you can try to convince them that [you are] a reasonably intelligent young man. You can’t do both.”
(–an adapted quote from A Hill on Which to Die by Paul Pressler, p. 152.)

A minister may fill his pews, his communion roll, the mouths of the public, but what that minister is on his knees in secret before God Almighty, that he is and no more.
-John Owen

“Since Christ is Lord of Heav’n and earth,
How can I keep from singing?”
(Trad. spiritual)

Here the true Paschal Lamb we see,
Whom God so freely gave us;
He died on the accursed tree—
So strong his love—to save us.
See, his blood now marks our door;
Faith points to it; death passes o’er,
And Satan cannot harm us.
Alleluia!
(Martin Luther, tr. Massie)

“We pretend to be unable to understand the Bible because we know well that the minute we understand it we are obligated to act” Kierkegaard

“A lack of prayer is pastoral malpractice.”
– Jonathan Worsley (9Marks First Five Years conference, Feb 2015)

Life Under the Sun

“The pain of regret is always worse than the pain of endurance.”
–Brett Habing (teacher of mine from college)

Music

“There are no bad choirs–only bad directors”
–Dr. W. Cook

Those other arts…

“You may be an undigested bit of beef, a blot of mustard, a crumb of cheese, a fragment of an underdone potato. There’s more of gravy than of grave about you, whatever you are!”
–Ebenezer Scrooge, Dickens’ “A Christmas Carol”

Teaching

“…Anyway, she’s quite an amazing teacher – she’s tough as nails, but then most of the good ones are.”
–JPS