Zeng Guofan's grandfather's "three unbeliefs" does not include which of the following?

Zeng Yuping, Zeng Guofan's grandfather, warned his family about "three unbeliefs", that is, not believing in medicine, not believing in monks and customs and not believing in immortals.

Source: I often tell my disciples and nephews what they want, but it's just the eight characters of Xinggang Palace, three unbelievers and eight books, and three auspicious things. Eight words say "test, treasure, morning, sweep, book, vegetable, fish and pig", but three don't believe it: "medicine, fairy, witch and monk." -"Zeng Guofan's Letter"

Gong Xinggang in this article is Zeng Yuping, Zeng Guofan's grandfather.