Sir Harold Gillies, regarded as the father of modern plastic surgery, codified his famous “Sixteen Principles” in 1957 after decades of pioneering work in reconstructive surgery during and after World War I. These principle, ranging from “Thou shalt make a plan” to “Thou shalt not throw away a living thing”, extended beyond technical advice; they embodied a philosophy of artistry, innovation, and patient‑centred care. In an era dominated by advanced imaging, microsurgical techniques, and emerging impressive technological adjuncts, it is timely to revisit Gillies’ words and examine their enduring relevance. This presentation will explore each principle through a modern lens, mapping them onto contemporary challenges such as virtual surgical simulation, complex defect reconstruction, and global surgical outreach. We will discuss how the principles continue to guide decision‑making, foster adaptability in the face of complex cases, and promote holistic care. This presentation will illustrate how the spirit of Gillies’ maxims remains evident in cutting‑edge practice. By recognising the timeless wisdom embedded in these succinct rules, we underscore the importance of surgical heritage in shaping future innovation. As Gillies himself might remind us: in plastic surgery, the tools may change, but the principles will endure.