What asserts its right to be heard?

Many define conscience as the capacity to determine between right and wrong.

This is to some extent a true definition, but you must remember that that capacity is so overclouded and warped by circumstances that you are more or less insane to right and wrong.

You are more or less distorted in your mental vision.

Conscience is nevertheless at work beneath all the madness―or error that overclouds your moral vision. Deep down in the recesses of the soul, the voice of conscience is ever crying for deliverance from the weight of sin and wretchedness that presses upon it. 

Sooner or later, it asserts its right to be heard.