This is a saying in relationship to scriptures in the bible.
It's basically saying that the reason Christians don't have the
things they desire (financially, spiritually, mentally, physically,
etc.) is because they are not asking God in prayer for it. They
simply hope, but aren't asking.
Matthew 7:7 Ask, and it shall be given you; seek, and ye shall
find; knock, and it shall be opened unto you:
8 For every one that asketh receiveth; and he that seeketh
findeth; and to him that knocketh it shall be opened.
9 Or what man is there of you, whom if his son ask bread, will
he give him a stone?
10 Or if he ask a fish, will he give him a serpent?
11 If ye then, being evil, know how to give good gifts unto your
children, how much more shall your Father which is in heaven give
good things to them that ask him?
what they mean when they say "you have not because you ask not"
is that you don't have somthing because you did not ask for that
thing...if you ask then you shall recieve...ex: you ask someone to
grab you somthing you need from the store, they give it to you. you
have asked therefore you recieve, if you don't ask you won't
recieve...