In this podcast, I consider the two approaches of Maimonides and Rav Crescas on how Abraham discovered God. 

 The main sources quoted in this podcast can be found here: 

Maimonides: https://www.sefaria.org/Mishneh_Torah%2C_Foreign_Worship_and_Customs_of_the_Nations.1.3?lang=en

Crescas: https://hebrewbooks.org/pdfpager.aspx?req=22063&st=&pgnum=135

 Dr Kadish: https://www.thetorah.com/article/how-did-abraham-discover-god-the-experiential-approach