It is said, that if someone really wants
something from Allah and does not get up to
pray Qiyyam al-lail (voluntary night prayers)
then he/she obviously doesn't want it bad
enough.
The Messenger (Peace and Blessing be upon
him) said: "The Gates of Heaven are open at
midnight, and a caller calls, 'Is there a
supplicant that his supplication may be
granted? Is there a petitioner that his petition
maybe granted? Is there a distressed person
so that his distress may be removed?'
At that time, no Muslim makes a Dua but that
it is answered, except for an adulteress who
trades with her body, or a person who
gathers his money unlawfully." [Sahih al-Jami'
2968]