The future is always changing, but the past is always the same.
The elegance of a theory is not just in its mathematical formulation, but in its ability to connect disparate phenomena under a unified framework.
所有人都是我们的导师,恶人通过他们的恶行说'不要靠近我'。善人总是善良的,所以所有人都像导师一样对我们。