Our life has many different phases. Sometimes, dark nights are triggered by crisis and the results are emptiness and deep spiritual calling.
Once you detach yourself from those psychological concepts and drama and employ techniques such as mediation to help connect with true yourself, you will see yourself evolving.
Phases will come and go, but life is made of much more than these. We all are connected by the universe's energy which helps us to grow and move forward.
Remember, there is no growth without pain and no light without the dark.