Mathematics, the closest humanity can get to understanding God
The questions asked in mathematics in general may seem simple or ridiculous on the outside but boil down to a basic desire to know that what we know is absolute and based on ideas we (in this case, mathematicians) agree are fundamental. Studying mathematics can be seen as a practical way to study human thought, or a way to bring us together to a shared understanding. On a practical level, mathematics is one way to understand and, to some extent, attempt to control the world around us. For me, mathematics is the closest humanity can get to understanding the secrets of the universe, the closest one can get to understanding God (however you may or may not define God).