And being raised without a mother, the hardness of your heart is understandable, as well.

6 seconds sound clip from the Rain Man (1988) movie soundboard.

You can hear this line at 00:12:45 in the Blu-ray version of the movie.

Quote context

[...]

- Rain what?

- You know, one of those imaginary childhood friends.

- What happened to him?

- Nothing. I just grew up.

- Not so much.

(THUNDER RUMBLING)

- And I remember, too, the day you left home, so full of bitterness and grandiose ideas, so full of yourself.

- And being raised without a mother, the hardness of your heart is understandable, as well.

- Your refusal to even pretend that you loved or respected me, all these I forgive.

- But your failure to write, to telephone, to reenter my life in any way, has left me without a son.

- I wish you all I ever wanted for you. I wish you the best.

- I hereby bequeath to my son, that certain Buick convertible, the very car that, unfortunately, brought our relationship to an end.

[...]