Yet, however slight may be the hope of discovering an answer, it is part of the business of philosophy to continue the consideration of such questions, to make us aware of their importance, to examine all the approaches to them, and to keep alive that speculative interest in the universe which is apt to be killed by confining ourselves to definitely ascertainable knowledge.
Philosophy's goals of uncertain knowledge is to keep interest in the unknown and speculative. It keeps us THINKING instead of accepting ascertainable knowledge and killing our need to think outside of the box for understanding.