Who Knows One? We All [Should] Know One!
The Gemara in Avodah Zara poses the following query: What is a ger toshav? A ger toshav is not obligated in all the mitzvos that a Yid is.
Emunah and Bitachon
Mitzvah to Believe in Hashem in the Gemara
How the Torah can command belief in Hashem, and why honest reasoning free of personal desires leads a person to recognize the Creator.