George Lucas, from the 2005 𝘙𝘦𝘷𝘦𝘯𝘨𝘦 𝘰𝘧 𝘵𝘩𝘦 𝘚𝘪𝘵𝘩 DVD commentary: “The thing that [Padme] says at the very end is, ‘I know there's still good in him.’ And that Luke says later on in 𝘙𝘦𝘵𝘶𝘳𝘯 𝘰𝘧 𝘵𝘩𝘦 𝘑𝘦𝘥𝘪 is, ‘There's still good in you.’ It's sort of recurring.” I think it was very intentional on George Lucas's part that he showed baby Luke silently bearing witness to Padme's last words, “There...is good in him. I know there is...still...”, only for Luke to immediately start crying the instant she passes--so that now Luke actually repeats his mother's last words, almost verbatim, while speaking to Leia in 𝘙𝘦𝘵𝘶𝘳𝘯 𝘰𝘧 𝘵𝘩𝘦 𝘑𝘦𝘥𝘪, just a few lines after he laments that he has no memory of her: “There is good in him. I've felt it.” So now there is an added layer of meaning to this scene in 𝘙𝘦𝘵𝘶𝘳𝘯 𝘰𝘧 𝘵𝘩𝘦 𝘑𝘦𝘥𝘪. It is now actually a scene about 𝘣𝘰𝘵𝘩 twins preserving a memory of their mother. Luke simply doesn't realize it consciously like Leia does. This is important because the subtext of the climactic scene where Darth Vader makes his choice in the throne room, according to Lucas in 𝘛𝘩𝘦 𝘔𝘢𝘬𝘪𝘯𝘨 𝘰𝘧 𝘙𝘦𝘷𝘦𝘯𝘨𝘦 𝘰𝘧 𝘵𝘩𝘦 𝘚𝘪𝘵𝘩, now has much to do with Luke's unconditional love for his father allowing Vader to overcome the all-consuming self-hatred he feels for breaking Padme's heart: “The end of the Saga is simply Anakin saying, ‘I care about this person, regardless of what it means to me. I will throw away everything that I have, everything that I have grown to love--primarily the Emperor--and throw away my life, to save this person. And I’m doing this because he has faith in me, loves me despite all the horrible things I’ve done. I broke his mother’s heart, but he still cares about me, and I can’t let that die.’” Luke becomes the vessel who transmits the unconditional love Padme expressed for Anakin in her final moments, which breaks the spell and allows Vader to finally feel unconditional love for his son.