Importunity is made up of the ability to hold on, to press on,
to wait with unrelaxed and unrelaxable grasp, restless desire,
and restful patience. Importunate prayer is not an incident
but the main thing, not a performance but a passion,
not a need but a necessity. - E.M. Bounds

Because of his importunity he will rise....
Knock, and it shall be opened unto you.
Luke 11:8-10