“Courage in danger is half the battle.”
Pseudolus, Act I, scene 5, line 37
Pseudolus
Original
Bonus animus in mala re, dimidium est mali.
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Plautus 54
Roman comic playwright of the Old Latin period -254–-184 BCRelated quotes
“Knowing that you possess a talent is half the battle in mastering it.”
Source: Time War (1974), Chapter 12, “The Metal Brain” (p. 128)

“You get him out and half the battle is won.”
Arjuna Ranatunga on Indian cricketer Sachin Tendulkar, Sachin Tendulkar: Quotable quotes on the batting legend http://www.khaleejtimes.com/article/20131112/ARTICLE/311129977/1051.

“True courage is in facing danger when you are afraid…”
Source: The Wonderful Wizard of Oz (1900)
Context: There is no living thing that is not afraid when it faces danger. The true courage is in facing danger when you are afraid, and that kind of courage you have in plenty.

“Just knowing that such states exist, that is, having symbols for them, is half the battle.”
Music, Mind, and Meaning (1981)
Context: Innate sentic detectors could help by teaching children about their own affective states. For if distinct signals arouse specific states, the child can associate those signals with those states. Just knowing that such states exist, that is, having symbols for them, is half the battle.