And these are not simple questions. Even on Krypton there is no precise science which provides us with the answers.

Jor El (Marlon Brando)

14 seconds sound clip from the Superman (1978) movie soundboard.

You can hear this line at 00:56:38 in the Blu-ray version of the movie.

Quote context

[...]

- The knowledge that I have matters physical and historic, I've given you fully on your voyage to your new home.

- These are important matters, to be sure, but still matters of mere fact.

- There are questions to be asked. And it is time for you to do so.

- Here in this... This Fortress of Solitude, we shall try to find the answers together.

- How does a good man live? What is virtue? When does a man's obligation to those around him exceed his obligation to himself?

- And these are not simple questions. Even on Krypton there is no precise science which provides us with the answers.

- I can only tell you what I myself believe.

- And to this end I've tried to anticipate your questions in the order of their importance to you.

- So, my son, speak.

- Who am I?

[...]