Ahhh... That's an easy one... MYSELF !!

Who do you believe in, DNice?

I believe a little bit in a lot of people. Right now I believe in Mossab Yousef Hassan who called out the Palestinian National Authority at the UN for acts against the Palestinians. I believe in Jake Tapper because he was the only journalist I saw covering the UN through this period. I believe in Angela Merkel for doing her best to fight prejudice in Germany on every front...neonazis, militant muslims. I believe in the woman who made the documentary 'The Aryans'. There's so many other acts, so many efforts. There are a lot of people to believe in.
I believe in friends I've made here for their curious natures and because they want to have a meaningful existence.

Reality, logic, reason, accurate mental models, emapthy, kindness, inclusiveness. Things like that.

I don't "believe in" these things in anything like the sense that for example a theist "believes in" god. The latter would be religious faith. I trust these things because they either accurately explain and/or predict experienced reality, or they are demonstratbly a positive way forward for humanity and for personal relationships. I trust them because they are actual things that actually exist, not that are merely asserted to exist. They can be examined, their effects measured, you can do A/B experiments with and without, etc. Also, in general, you can distinguish between these concepts and principles and effects, and your imagination.

Science.truth,facts and reason.

Most dogs and myself.