You need to learn to discern the voice of divinity by knowing with your heart. Your heart can feel what you must do, according to your conscience. If the voice is guiding you to do what you are afraid to do, but you feel in your heart that it is what is right and that it must be done, then that voice is coming from the conscience.
When in doubt, remain cautious and wait. Do not assume it is or is not divinity guiding you, but wait and reflect until you know for certain.
"If thou canst not make thine own self what thou desireth, how shalt thou be able to fashion another to thine own liking. We are ready to see others made perfect, and yet we do not amend our own shortcomings."
—Thomas à Kempis