See: AS FAR AS.
{adv. phr.} 1. To the degree or amount that; according to what, how much, or how far. * /John did a good job as far as he went, but he did not finish it./ * /So far as the weather is concerned, I do not think it matters./ * /As far as he was concerned, things were going well./ 2. To the extent that; within the limit that. * /He has no brothers so far as I know./ Compare: FOR ALL(2).