"At first, I was greatly influenced by the Aristotelian tradition, represented by the Islamic and Christian worlds, a tradition in which Aristotle was the philosopher of those who wanted to give a philosophical basis to those who had a religious faith. Later, I realised that Aristotle did not have this problem at all; Aristotle's interest was exclusively scientific, leading him to deal with areas that have become our current sciences, and to question concepts such as cause, a concept much broader than how we conceive it on a daily basis."