What does “inner beauty” mean to you?

 "Inner beauty" means the beauty of the mind. ✔

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I think the beauty of the mind is more important than the appearance. --> I think that mental beauty is more important than physical beauty. => Another way: Your sentence is okay and this is another way of saying it.

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Can't we just stop talking about it? --> Can we just drop it?

I can help you. or Let me help you. --> Let me give you a hand. 

=> Your sentence has a correct grammatical structure, but this has the correct usage/ expression.

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