Quadra Values.
For one, we don't trust Ni, as Ni is the Devil. This means that we don't like believing in something just for the sake of believing in it. We are always cautious enough to hear about what other people have to say and we don't like being caught off guard.
Then, there is Te. Te is the practical logic. We bother learning about things (everything) that we see may have a purpose, and when this is combinded with Si, we try and learn it thoroughly. Because we do this so often, we feel that we have enough knowledge on certain subjects to "teach" or help out others.
And we enjoy helping you out because of our Fi. You're welcome.