Facts reliable?

We are very proud of our knowledge.
Of course there is nothing wrong in having a knowledge about many things
However, if the knowledge is used for a wrong purpose, or with a wrong motivation, then that knowledge has no value, or even has minus value.

I heard that even with the same sets of the "facts", human being has an ability to draw the two totally opposite conclusions.

So, what's the point of having a big knowledge?
Knowledge itself has no value if it's not used for a right purpose and with a right motivation.
It is not nice to be proud of your big knowledge, but in fact, knowing more requires more responsibility for what you know.

Therefore, knowing sometimes is very scary
because it comes with responsibility and expectation
So, why not put your focus on building right purpose and right motivation,
instead of cultivating knowledge for your pride or to hurt people?