If we are of God, He hears us  -  1 John 4:6

We are of God: he that knoweth God heareth us; he that is not of God heareth not us. Hereby know we the spirit of truth, and the spirit of error.

Those who are born of God has the assurance that God hears them. On the other hand, those that are not of God, the individuals who refuse to accept Jesus as their Saviour, are not heard by God, until they cry out to Him with a repentant heart.