Why is it that we usually ignore the forth dimension? Because we have no freedom of movement within it. You see, we can move in the other three: Up, down, forward, sideways, backward, but when it comes to time, we are prisoners.

— H. George Wells (Rod Taylor)

15 seconds sound clip from the The Time Machine (1960) movie soundboard.

You can hear this line at 00:09:10 in the Blu-ray version of the movie.

Quote context

[...]

- What do you mean?

- Let's take that box. It has the first three dimensions, as you said.

- All right. What's in that box?

- I'm coming to that.

- Let's consider this first.

- Why is it that we usually ignore the forth dimension? Because we have no freedom of movement within it. You see, we can move in the other three: Up, down, forward, sideways, backward, but when it comes to time, we are prisoners.

- Do you follow me?

- No!

- You've given a most lucid explanation, but I'm afraid I don't quite understand.

- There are many things in this world you don't understand, aren't there?

- Yes, quite. Quite a number.

- You don't refuse to believe in them, because of that, do you?

[...]