He who has begun has half done. Dare to be wise; begin!

   —Horace, Epistles (20 BC), Book I, epistle ii, lines 40–41

 The kingdom of God cometh not with observation:
Neither shall they say, Lo here! or, lo there! for, behold, the kingdom of God is within you.

   —Jesus, in the Gospel of Luke (c. 90), 17:20–21 KJV

 Any man's death diminishes me, because I am involved in mankind; and therefore never send to know for whom the bell tolls; it tolls for thee.

   —John Donne, Devotions Upon Emergent Occasions (1624), 'Meditation 17'

 Give me the liberty to know, to utter, and to argue freely according to conscience, above all liberties.

   —John Milton, Areopagitica (November 23, 1644)

 The mind is its own place, and in itself
Can make a Heaven of Hell, a Hell of Heaven.

   —John Milton, Paradise Lost (1674), Book I, lines 254–255

 The gates of hell are open night and day;
Smooth the descent, and easy is the way:
But to return, and view the cheerful skies,
In this the task and mighty labor lies.

   —John Dryden, The Works of Virgil (1697), Aeneis, Book VI, lines 192–195

 What is twice read is commonly better remembered than what is transcribed.

   —Samuel Johnson, The Idler, No. 74 (September 15, 1759)

 There is much pleasure to be gained from useless knowledge.

   —Bertrand Russell, In Praise of Idleness and Other Essays (1935), Ch. 2: 'Useless' Knowledge

 When you're in love, you want to tell the world.

   —Carl Sagan, "With Science on Our Side", Wash. Post (January 9, 1994)