Mathematics is the key and door to the sciences.
You can’t live in the world without an idea of the world, but it’s impossible to live in the world with your idea of the world.
田横的五百壮士如今在哪里?难道归来后都能封侯吗?
释义:做事要有合理的理论依据,这样有利于成就大事。自古以来,征战与讨伐必须师出有名。