in numeris vires
Sorry but,
what follows is what you can find googling for "vis in numeris"
De numeris: MS Hannover, Landeskirchlichen Archiv D 10 Nr. 1 (PfA Bissendorf HS 20) ff. 186r-195v [inc: Quanta sit vis in numeris noverant hii…
The beginning ('incipit' in latin, which is 'inc:' in the reference above) says: Those (they?) were aware of how much strength (how much value) is in numbers...
spiccioli.
"damn intuition sometimes is dead wrong" said I after looking at this http://www.google.co.uk/search?sourceid=chrome&ie=UTF-8&q=%22in+numeris+vires%22
but note how efficient G has became lately
It's worse than you think, Vladimir. Did you look at the time stamps of both postings? g (I use small case because I read somewhere that their algorithms can't detect it--yet) had the search results for that phrase a clear seven minutes prior to its posting here on this forum, therefore knew what you were going to think before you did.