It is not. There is an association with ambitious and grandiose in general language at times.
I think it is related to whole 'the meek shall inherent earth' way of thinking. Which is a whole other debate if we get into the gospels of Matthew, Luke and Q issue.
Which if you follow the logic of the statement to Matthew 5:3 it related more to an understanding of poverty and conduct. Ironically very much in line with something Marcus Aurelius would say.
http://dictionary.reference.com/browse/ambition