There are many difficulties with the existing interpretation of Brentano’s works. The problem stems from the fact that Brentano’s works, letters, manuscripts, memoir’s, etc. remain unpublished or undiscovered. Moreover some Brentano’s scholars, namely Kastil and Mayer-Hillebrandt, were incorrect in their method in publishing the philosopher’s works. Namely, they misinterpreted his earlier works by incorporating numerous interpolations from different time periods as being the philosopher’s final thoughts. More importantly, as evidenced by Antonio Russo’s recent discovery, they also failed to realise the (...) fact that Brentano’s own theoretical views or works were mostly based on Aristotle and Thomas thoughts on metaphysics, that Brentano’s main intention was to develop a scientific demonstration on this topic, and that this issue occupied his mind until his death. It is hoped that this paper goes some way in resolving the said errors and coupled with the continue discovery of new material that the jigsaw of Brentano’s works and thinking shall someday be correctly completed. (shrink)