But it doesn't mean that the charactristics with which we are born are sinful. It doesn't mean that we have any obligation to be similar to one another.
Just as every race has it's own weak and strong points, just as can't tell people to change their colour, just as there is no merit or demit in being born this way or that way, So is the case with temperaments and personality types.
PS. I am not trying to justify sins by speaking about personality types, It is true that each type may have a greater or lesser tendency to special sins. Differences in race, gender, environment and other factors too can give us differnt tendencies to sin but It doesn't mean that if I say that I am a persian woman I am trying to justify my sins. In the same way, temperants are not licenses to do evil, but they are:
1- real
2-God's plan and choice for you.
3- not evil.
I think it is dangerous when preachers attempt to be psychologists. Those personality-type things are oversimplified and can lead us to label ourselves instead of actually getting to know ourselves.
There is a subtle tendency that I see in those three items about temperaments.
The first suggests that if your temperament is "real", any experience that you have to the contrary is not real. For example, if you believe you have a timid temperament, but in a crisis you feel courageous, you might refuse to act on your courage because it does not fit the "reality" of your label. Likewise, if someone has labeled himself an "Alpha", he might believe that a willingness to let someone else take charge is not "real", and disobey it, even if it is the right thing to do.
The second seems like the Protestant heresy that disconnects each individual Christian from the larger Communion of Saints, leading individuals to ignore moral and ethical standards because they think their life-plan is uniquely privileged.
The third is the pagan heresy of denying the actual existence of evil, and we need only to look around to see where that leads.
Here is a link to a Catholic psychology resource that I hope will be helpful:
http://www.chastitysf.com/home.htm