SHAFAQNA = It is narrated from Imam Sadeq (AS) who said: There are some positions with Allah (SWT) and the only way of attaining them is through Dua (prayers). Then Imam Sadeq (AS) explained: there is a position with Allah (SWT) that cannot be reached except by Dua and request from the Almighty and if a servant of God closes his mouth and does not request anything, it will not be given to him; therefore ask God to give it to you because if you bang on any door and persist, eventually it will open [1].
[1] Kafi by Yaqoob Kolayni, Vol. 2, Page 466.