The molecular processes of life are naturally dynamic in space and time from the atomic to the organismal level. The rapid development of imaging methods across the full scale of biological organisation is revolutionising our ability to visualise the inner workings of macromolecular complexes, organelles, cells, tissues, organs and whole organisms. Being able to see biological processes unfold in real time allows us to understand the mechanisms of life as well as disease. The symposium will bring together the leading developers of imaging methods with cutting-edge applications that illustrate how imaging can answer biological questions. We will emphasize methods that can capture the dynamics of life, spanning the whole range from molecular resolution to imaging of whole organisms. From its beginning in 2011, ‘Seeing is believing’ has embraced novel imaging technologies that open new windows for biological discovery, including single-molecule and super-resolution, light sheet and correlative light electron microscopy.