Music is not only a sensory experience, but also an emotional, mental and even spiritual journey. Philosophy questions this journey and seeks to understand the nature of music, its relationship with human beings and its place in the universe. From Ancient Greece to the present day, philosophers have put forward profound thoughts on understanding beauty, goodness and nature through music. In this study, J.S. Bach's “Well-Tempered Clavier” is analyzed from a Stoic perspective within the framework of the Stoic principles of 'Universal Reason', 'Universal Order', 'Virtuous Life' and 'The Quest for Perfection'. The fact that the fugues in “Well-Tempered Clavier” have a similar structure to each other has been interpreted as a direct connection to the Stoic belief in a universal reason, the search for universal order, the Stoic belief that everything in the universe operates according to the same basic principles, and the belief in the existence of a divine plan in the creation of music as an expression of respect for universal reason.

Johann Sebastian Bach, Stoa, Well-Tempered Clavier, Füg, Prelüd