一係就intellectual level 差唔多。
一係就intellectlly compatible。Compatible o既話，佢可以level低我好多。
2010.01.25 Monday (c) All rights reserved by ACHK
However, the path integral formulation is also extremely important in direct application to quantum field theory, in which the “paths” or histories being considered are not the motions of a single particle, but the possible time evolutions of a field over all space.
Much of the formal study of QFT is devoted to the properties of the resulting functional integral, and much effort (not yet entirely successful) has been made toward making these functional integrals mathematically precise.
— Wikipedia on Path integral formulation
2010.01.25 Monday ACHK
The ultimate definition of success in life is
that your spouse likes and respects you ever more
as the years go by.
— Jim Collins, in his Good to Great
愛情, 是失去對方的過程. 除非, 雙方也是人格完整的人.