The common expression by all means seems to advocate the use of all means possible in order to accomplish a certain object, when in fact it expresses the use of any means to do it. I realize that all can mean any when used with a negative phrase, such as beyond all hope. Because, of course, if one is beyond any hope, he is also beyond all hope (and vice versa). But in a positive context, such as with by all means, it doesn't necessarily follow that when one uses any means to accomplish a task, that he uses all possible means. Why is all used to mean any in this expression?


To my ear, any means exhorts any one particular method, whereas all means implores the use of all and sundry methods.


I think of it as being a shortened version of "by all means possible or necessary". The "possible" is implied in the phrase; it is a common and quite old phrase as well.

Here is an excerpt from an article by Ted Nesbitt - 11/10/2006, on Allexperts.com:

This phrase is very peculiar. The original version was "by all ways" and the negative version was "in no ways." [Incidentally, the old English spellings were wayes and wyse for "ways."] Both of these are now considered obsolete. The all ways or all means is the positive view, and it means certainly. The negative version, of course, means "certainly NOT". The Oxford English Dictionary -- the ultimate source for word and phrase origins -- gives the year 1593 as the first written usage of by all means. It appeared in one of Hooker's ecclesiastical treatises.


Consider these two sentences employing the same structure:

'This machine can be operated by all people.' - thus - 'This task can be completed by all people.'

Here, we mean that any individual would be capable of completing the task.

Does the same not carry then for,

'by all means'

That said, however, it is my understanding that 'by all means' and 'by any means' have different meanings:

'by all means' - a response to a request; 'of course'

'by any means' - to indicate that you will try everything to achieve your goal (aside: here, also note that 'everything' means 'every single thing until one works', not 'all things at once') .

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