Seldom he smiles, and smiles in such a sort as if he mocked himself, and scorned his spirit that could be moved to smile at anything.

8 seconds sound clip from the Julius Caesar (1953) movie soundboard.

You can hear this line at 00:16:01 in the DVD version of the movie.

Quote context

[...]

- But I fear him not.

- Yet if my name were liable to fear, I do not know the man I should avoid so soon as that spare Cassius.

- He reads much. He is a great observer, and he looks quite through the deeds of men.

- He loves no plays as thou dost, Antony.

- He hears no music.

- Seldom he smiles, and smiles in such a sort as if he mocked himself, and scorned his spirit that could be moved to smile at anything.

- Such men as he be never at heart's ease whilst they behold a greater than themselves, and therefore are they very dangerous.

- I rather tell thee what is to be feared than what I fear, for always I am Caesar.

- Come on my right hand, for this ear is deaf, and tell me truly what thou think'st of him.

- Would you speak with me?

[...]