Our more certain knowledge of Alvarus begins when he met his friend Eulogius for the first time while studying under Speraindeo, "magister" (‘teacher’) of young clerics. Alvarus and Eulogius developed a strong friendship which was to last until Eulogius's martyrdom, a friendship which developed into some sort of Platonic love. In his biography of Eulogius, Alvarus writes that Eulogius once said to him “let there be no other Albar but Eulogius, and may the whole love of Eulogius be settled nowhere but in Albar.” The two students were perhaps overconfident in their learning and frequently debated issues of Christian doctrine that they did not understand well enough to have any meaningful contribution to make; later they destroyed the “volumes” of their letters that resulted from these friendly but overzealous debates. They also each developed a love for poetry during this time which would be a secondary lifelong passion.