Below, in my opinion, are some of the most profound and beautiful lines from Shakespeare's plays. I know there exist millions more, and if I had all the time and space in the world, I would gladly compile all of them. But for now, here are some favorites:

1. "We are such stuff as dreams are made on, and our little life is rounded with a sleep." - Prospero, The Tempest

2. “I do love nothing in the world so well as you: is not that strange?”
- Benedick, Much Ado About Nothing

3. “This above all: to thine ownself be true.
And it must follow, as the night the day,
Thou canst not then be false to any man.”
- Polonius, Hamlet

4. "If music be the food of love, play on." - Orsino, Twelfth Night

5. “All the world’s a stage,
And all the men and women merely players:
They have their exits and their entrances;
And one man in his time plays many parts.”
- Jaques, As You Like It

6. "Parting is such sweet sorrow." - Juliet, Romeo and Juliet

7. “Men at some time are masters of their fates:
The fault, dear Brutus, is not in our stars,
But in ourselves, that we are underlings.”
- Cassius, Julius Caesar

8. "Love is blind, and lovers cannot see the pretty follies that themselves commit." - Jessica, Merchant of Venice

9. “Life’s but a walking shadow, a poor player
That struts and frets his hour upon the stage
And then is heard no more: it is a tale
Told by an idiot, full of sound and fury,
Signifying nothing.”
- Macbeth, Macbeth

10. "There are more things in heaven and earth, Horatio than are dreamt of in your philosophy." - Hamlet, Hamlet

11. "The course of true love never did run smooth." - Lysander, A Midsummer Night's Dream

12. "The fool doth think he is wise, but the wise man knows himself to be a fool." - Touchstone, As You Like It

13. "Love looks not with the eyes, but with the mind, and therefore is winged Cupid painted blind" - Helena, A Midsummer Night's Dream

14. "Cry 'Havoc,' and let slip the dogs of war;
That this foul deed shall smell above the earth
With carrion men, groaning for burial." - Antony, Julius Caesar

15. "What a piece of work is man." - Hamlet, Hamlet

16. "Though she be but little, she is fierce." - Helena, A Midsummer Night's Dream

17. "Love sought is good, but given unsought better." - Olivia, Twelfth Night

18. "Lord, we know what we are, but know not what we may be." - Ophelia, Hamlet

19. "Nothing will come of nothing" - Lear, King Lear

20. "Our doubts are traitors, and make us lose the good we oft might win, by fearing to attempt" - Lucio, Measure for Measure

21. "Wisely, and slow. They stumble that run fast." - Friar Lawrence, Romeo and Juliet