There are times when the things you think you know aren't always the correct thing to do. Although they seem to be right even to others but they really aren't.
To know fully if something is right, you have to seek and be sure it truly is. You have to make research even past your own knowledge. You have to be completely sure that even after making those reaserch it still remain correct and true.
RESEARCH MAINLY IS TO BOOST YOUR CONFIDENCE.
You might not know it but that's the main aim. If you were sure before making those research, what do you think will be your stand if you're still correct after making them.
Imagine being sure that the stars are just the normal shape you see everywhere about them. And after making your research you found out that it's not like that at all. Do you know how confident you'll be if you face a question like that next time?