I don't know what I believe in. I used to believe in God - the Christian one - until my late teens. My mother's passing when I was 16 caused a deep questioning within, one that still burns strong to this day. Buddhism's focus on human beings endless suffering put words to how I was feeling in my early 20's but did not provide all the answers to which I sought. The Tao (pronounced dow), a way of life for many Chinese people, teaches that everything is connected, in a yin and yang fashion and its teachings helped broaden my knowledge of the spiritual world.
"Giving birth, nourishing life, shaping things without possessing them, serving without expectation of reward, leading without dominating: These are the profound virtues of nature, and of nature's best beings."
-The Tao Te Ching of Lao Tzu
Although I've never experienced God or anything of the sort, I have experienced synchronicity. Synchronicity is defined as events that occur at the same time that seem to be connected but there is no conventional explanation. This is where the phrase in sync comes from, not the 90's boy band. I can't say whether synchronicity comes from god or is a random occurrence but all the same, it feel eerily spiritual to me.
I don't know what I believe in or that I need to believe in anything. I also don't know if it matters. I do know that by remaining open to the unknowns that surround me is where I find wonder and beauty to exist and to me, that's all that truly matters.