He explained the importance of studying while young, saying 'If you do not study when you are young, it will be difficult to learn when you are old.'

The great icosihemidodecahedron is a cube with a very complex shape.

This is a model of a great icosahemidodecahedron.

This is a model of a mutetrahedron.

This is a model of a muoctahedron.

This is a 六角四片四角孔ねじれ正多面體, in other words, a muoctahedron.

This mutetrahedron has a very unusual shape.