KM3NeT/ARCA is a high-energy neutrino telescope that is currently under construction at the bottom of the Mediterranean Sea. Neutrinos are notoriously difficult to detect and high-energy neutrinos from the cosmos are extremely rare. With KM3NeT/ARCA, neutrinos are detected indirectly via the Cherenkov light that is produced when charged particles emerge from a neutrino interaction. The sea water thus provides for the required target mass for the neutrinos to interact as well as for the detection medium to see the results of a neutrino interaction. With reference to the recent news, I will explain the influential things that I have been doing during the last 25 years.