He came early to believe that the sun is at the centre of the universe, and that the earth has a twofold motion: a diurnal rotation, and an annual revolution about the sun.

• 氏之见解，早年就认为太阳居宇宙之中心，而地球有双重转动，一是一昼夜之自转，一是绕太阳一年之公转。氏之学说，生前不予发表，惧教会之申斥也。