- I wish you would tell me how to become young again.
- Can you remember any great errors that you committed in your early days?
- A great many, I fear.
- Then commit them over again. To regain one's youth, one has merely to repeat one's follies.

Lord Henry Wotton (George Sanders)

10 seconds sound clip from the The Picture of Dorian Gray movie soundboard.

You can hear this line at 00:26:32.284 in the Blu-ray version of the movie.

Quote context

[...]

- I'm vexed with you, Harry. Why do you try to persuade Mr. Gray to give up the East End?

- He's a wonderful musician, and they love his playing.

- The East End is a very important problem.

- Quite so. It's the problem of slavery, and we try to solve it by amusing the slaves.

- I suspect we're interested in the poor in order to amuse ourselves. Especially as we grow older and are unfit for other amusements.

- I wish you would tell me how to become young again.

- Can you remember any great errors that you committed in your early days?

- A great many, I fear.

- Then commit them over again. To regain one's youth, one has merely to repeat one's follies.

- A delightful theory.

- A dangerous theory.

- One of the great secrets of life. Most people die of a sort of creeping common sense and discover too late that the only things one never regrets are one's mistakes.

- But surely if one lives for oneself, one pays a terrible price for doing so.

- Yes, we're overcharged for everything nowadays.

[...]