Beatus was directly involved in the debate surrounding adoptionism, which argued that Jesus was born a man, and was adopted by God and acquired a divine dimension only after his passion and resurrection.
Beatus var direkte indblandet i debatten om adoptionismen, der påstod, at Jesus blev født som menneske, blev adopteret af Gud og først opnåede guddommelighed efter sin lidelseshistorie og genopstandelse.