What is the quote for paper is patient?

From the text:

There is a saying that ‘paper is more patient than man’ it came back to me on one of my slightly melancholy days, while I sat chin in hand, feeling too bored and limp even to make up my mind whether to go out or to stay at home. Yes, there is no doubt that paper is patient and as I don't intend to show this cardboard-covered notebook, bearing the proud name of ‘diary’, to anyone, unless I find a real friend, boy or girl, probably nobody cares. And now I come to root of the matter, the reason for my starting a diary: it is that I have no such real friend.