根。The Source

根本的脾气不是从吃东西来的，
也不是从天来的，地来的，也不是从什么气候来的，
就是从自己这个无名来的。
无名是从什么地方来的？
就是自私在后边作怪。
所有的烦恼，都因为自私在后边支持着，
所以就有很多脾气，很多烦恼。
因为怕自己吃了亏，怕对我有所损害，
所以才要发脾气，要争。
如果你『不争，不贪，不求，不自私，不自利』，
什么脾气都没有了。

Our temper does not come from our food or heaven
or earth or the climate,
but rather from our own ignorance.
Where does ignorance come from?
It is our selfishness working behind the scene.
All affiliations are supported by selfishness.
That's what causes us to have a bad temper
and many affiliations.
We are afraid of taking a loss or of being hurt,
so our tempers flare and we start to fight.
If we can avoid fighting, greed, seeking, selfishness,
and pursuit of personal advantage, we will not have a temper.