The Sceptical Chymistor by Robert Boyle is a profound exploration of the principles of chemistry and alchemy challenging the established notions of his time. Boyle often regarded as one of the founders of modern chemistry employs a skeptical approach to the spagyrist''s principles questioning the validity of traditional alchemical practices. Through a series of doubts and paradoxes he seeks to clarify the nature of substances and their transformations advocating for a more empirical and experimental methodology in the study of matter which laid the groundwork for future scientific inquiry. *** In this work Boyle articulates his skepticism towards the mystical elements of alchemy emphasizing the importance of observation and experimentation over dogma. He critiques the reliance on hypothetical principles that lack empirical support urging a shift towards a more rational understanding of chemical processes. By dissecting the spagyrist''s claims Boyle not only defends the scientific method but also invites readers to engage critically with the natural world. His insights remain influential marking a significant transition from alchemical traditions to the foundations of modern chemistry.