
If you have questions about the conjugation of бескорыстие or Russian nouns in general, you can practice and get feedback from a professional tutor.
При чем же тут бескорыстие?
What has unselfishness to do with it?
Я знаю, ты переживаешь за меня, и ещё знаю, что подобное бескорыстие тебе даётся нелегко...
I know you're worried about me, and I also know that that kind of unselfishness doesn't come naturally to you.