Questioning the Source of Knowledge.

I just read a quotation attributed to Abraham Lincoln. It says:

All I have learned, I learned from books

I find it a little odd that the quoting of it should be considered an indicator of great wisdom (as indicated by the quoting of the statement.) I mean no denigration of books – they have, after all, been a primary source of learning for a very long time – when I say that you can’t claim to truly know anything just because somebody said it, whether in a book or by any other means. I would be more comfortable with the statement:

All I know, I have learned from personal experience

Maybe I’m being pedantic again, but I might just mention that I found the quotation on a bookmark given away free by a book retailer.