This book is a thematic extraction from a larger research work "Kim tat Brahma (What is That Brahman)?" which is roughly around 4000+ pages (split across multiple volumes) is honestly speaking, a humble yet sincere attempt on an unbiased holistic inter-disciplinary research involving traditional schools of philosophies (oriental and occidental) and modern science in unravelling the mysteries of nature and discovering the supreme divinity which is the infinite dimensional pure absolute non-dualistic singularity that underlies the infinite varieties observed not only in the phenomenal world, but is also the ultimate truth hidden behind all the philosophical perspectives. The present volume provides a detailed inquiry into the spiritual significance of the legends around Lord Murugan, His incarnation, birth and festivals analyzing it from various original sources ancient Tamil and Sanskrit scriptures including Vedas, Agamas/Agamas, Epics, Puranas, Tamil Sangam Literature, Tamil Bhakti Literature, Siddha Literature, Saiva Siddhanta as well ascomparative analysis from modern science and other religions as well. Wherever possible there is a very comprehensive quotation from these sources in its original language as well as an English transliteration and translation (from scholars) of the same. I strongly believe this book will greatly help for Indology research scholars and Murugan devotees.