There's no art
To find the mind's construction in the face:
He was a gentleman on whom I built an absolute trust.
Enter Macbeth ...
William Shakespeare, Macbeth
I love this because King Duncan is actually talking about someone else, a traitor who he trusted. But to have Macbeth enter right after those words, especially when we know Macbeth will become another such traitor ... well, timing is everything. Shakespeare, you genius you!