"All the darkness in the world cannot extinguish the light of a single candle.“ – St. Francis of Assisi (attributed)
Through Christ we are that candle.
So be not afraid when you feel darkness surrounding you, shrouding you so that the stars seem blotted. You will not be harmed. Pray…and the Light will dispel that which overshadows you. God is Light and Him there is no darkness at all.