As simple as possible to summarize the best way you can, first, please. Feel free to expand after, or just say whatever you want lol. Honest question.
Simple answer: I find I carry on believing in God in much the same way I believe in Science. A mixture of experience, logical coherence, testimony, teaching from people I trust, and connection with other things I know/believe, that makes - to my mind - God's reality overwhelmingly more likely than not.