She's apathetic about this problem; it doesn't matter to her at all.
I have some important news.
Belief is important, but reality is more important.
What matters most in friendship is loyalty.
During her short life, she accomplished many important things.
It's very important that we prevent this disease from spreading.
If you want people to believe you, proof is important.
You must forget about this failure, my son. It means nothing. There's no question that you'll succeed in the end.
The answer (to the question) who wants to leave doesn't matter, tell them to please stay.
(No matter who wants (or: may want to leave, tell them to please stay.))
Short time, long time, doesn't matter
(It doesn't matter how long it takes.)
It's important in Na'vi philosophy that the prey not suffer unnecessarily when it's killed.
You matter the most to me.
The most important characteristic of a warrior is bravery.
When one has no useful thoughts, the ability to close one's mouth is important.
Thank you so much for your leadership, your support, and most importantly your friendship throughout the years.
In this art it's impossible to arrive at perfection; the only thing that matters is the attempt to arrive there.
On this important /day)—Earth Day—I want to say hello to you and present to you the word that, in my opinion, is the most beautiful in the Na'vi language: meoauniaea. The meaning of this word is "harmony, living in the world as part of the Great Mother," something that matters a lot to all of us for the sake of The Balance of Life on both Pandora and Earth.