In the picture, there are two characters "Gewu" in seal script.
These two words are often combined with "to achieve knowledge", which means "to study things to achieve knowledge".
"Studying things to achieve knowledge" originates from the eight items in "Book of Rites? University" - investigating things, achieving knowledge, sincerity, righteousness, self-cultivation, ordering the family, governing the country, and bringing peace to the world. To understand something, you must first know it; to know it is to examine the object and then know it, and to know it first, then the meaning can be sincere." This paragraph.
Studying things to achieve knowledge is generally understood as “investigating the principles of things to obtain knowledge.”