How can you have a quiet child? How can you simply identify the temperament of those around you? Which are the four temperament? Being sanguine, doing choleric, feeling melancholic, thinking phlegmatic.
Temperament is how God created each of us and represents our powerful potential? Will parents will build character in such way to balance and complete with the temperament?
For example, if your life partner has the principal temperament as thinker, then secondary as feeler, being the strong points, in character will need to focus firstly on doing things, then secondary on being friendly, the last ones being the weak point.