Through a balance between exhaustive technicality and the simplifications of scientific popularization, this work presents an accessible but rigorous introduction to field theory. In this way, it offers us a didactic and accessible journey through the foundations of the subject, passing through topics such as "wave-particle duality" and "spontaneous symmetry breaking".  This work is designed for students and researchers from different fields, as well as for curious readers who want to acquire an introductory, solid and structured understanding of one of the most profound conceptual frameworks of modern physics.