The aim of this article is to evaluate the role of experience as a mechanism that authorised Jesuit discourses on Americas in the Sixteenth Century. The missionary displacement of the Inacians to America can be faced both as a mean to legitimate accurate discourses about the new land and its inhabitants and the theological principle that provide meaning and finalist orientation to their texts. Pieces of writing by José Acosta and Manuel da Nóbrega are taken here rather as examples of this typical modus operandi of the Company of Jesus in the New World than different circumstances to be compared.