There is a proverb saying, 'A poor workman complains of his tools,' implying that 'a person who has skills can write beautifully using any sort of brush,' but it doesn't mean that people can use poor-quality brushes while learning calligraphy.
「弘法筆を択ばず」という噂俗言があるが、これは、「どんな筆でも立派に書き得るだけの力量がある」という意で、学書の時、どんな悪い筆を使ってもよいという意ではない。