Because I feel and have always felt that there must be more to life than this.
There is.
A calmness and feeling that someone was speaking to me reassuring me and telling me I was going to be alright
Depending on the spiritual teaching, this could be known as the Christ consciousness, the Buddha mind, the 'True I' the 'True Self' The observer of all that is observed or just simply consciousness itself.
In essence you are a spiritual being having a human experience. When this is known all becomes observed, serene, peaceful and calm. There is a knowingness that the universe is looking after all and there is no need for our intervention.
So if it is a voice you hear, I would say it is the universal voice. It has always been there, it is there now and will be there in the future. It has been blocked by the ego. When it comes to the light from the dark place, you are enlightened, awakened from the sleep and a realisation that this human life is all an illusion, a dream.
It has nothing to do with religion. Religion is merely a concept, constructed by humans out of egoic thought.
Christ was not a Christian,
Allah was not a Muslim,
Buddha was not a Buddhist,
Lao Tzu was not a Taoist and so on..........