That she gives more than most others doesn't imply that her belief that giving even more is practically impossible isn't hypocritical. Yes, she very likely believes it, thus it is not a conscious lie, but only a small minority of falsities are conscious lies.
I don't believe it's practically impossible to give more than I do. I could push myself farther than I do. I don't perfectly live up to my own ideals. Given that I'm a human, I doubt any of you find that surprising.
Here's the new thread for posting quotes, with the usual rules: