Whereas you might learn a few interesting tidbits along The Way, the purpose of philosophy lies in the realization that we cannot [actually] understand anything. What we believe we understand is "close enough" to be somewhat practical and allows us to function reasonably well [at times], but actual understanding is light-years beyond our meager intellectual and perceptual capabilities. A current example of this inaccessibility to comprehension would be the ideology of Leftist political thinkers. Although the philosophy of Leftism [each according to their ability...] might appeal to the heart, it results in utter mayhem en praxis. Just the same, the human intellect seems to ignore these inconvenient truths and marches resolutely into the abyss. The same applies to [literally] everything else [be it quite subtle in most cases]. So look at philosophy as the conveyance in the Buddhist metaphor of leaving the boat behind once you have crossed the river of knowledge. Beyond knowing is where philosophy must aim least you capsize and get sucked down by the vortex [ego] into nihilistic intellectual purgatory.