Any piece of knowledge I acquire today has a value at this moment exactly proportional to my skill to deal with it. Tomorrow, when I know more, I recall that piece of knowledge and use it better.A-Z Quotes. 2020. TOP 25 QUOTES BY MARK VAN DOREN | A-Z Quotes. [online] Available at: <https://www.azquotes.com/author/22233-Mark_Van_Doren> [Accessed 13 June 2020].