• Also known as the Five Ways, Quinque viae refers to a set of five logical arguments to prove the existence of god.
• One of them is that the marvels of the world cannot be explained except by the existence of an intelligent creator.
• The other four are based on the logic that everything must have an original cause. 
• The arguments were proposed by Catholic religious philosopher St. Thomas Aquinas in his 13th century book Summa Theologica.
• Aquinas believed that while god may not be obvious to the human mind, his existence can be recognised through observation of how the world works, which in turn served as the basis for his five arguments for god.

Source:TH