The IceCube Neutrino Observatory is a cubic-kilometer scale detector located deep in the glacial ice at the geographic South Pole. Construction took place during the Austral summers of 2005--2010. By 2013, the existence of a high-energy astrophysical neutrino flux was established by an excess of neutrino detections above $\sim10$\,TeV inconsistent with the expectation from atmospheric backgrounds at the $5.7\sigma$ level. In this talk I will
review the ongoing efforts to characterize this flux and to identify its sources. I will also discuss the trajectory of IceCube neutrino astronomy in the coming years, including novel analysis methods, multi-messenger astronomy, and proposed detector extensions.