I began to write this article on Thursday of last week, 11th December, which was the day of Kārttikai Deepam, but for various reasons I was unable to complete it till today, 18th December.
Kārttikai Deepam is an annual festival celebrated in the Tamil month of Kārttikai (mid-November to mid-December) on the day on which the moon is in conjunction with the constellation Pleiades (known in Tamil as kārttikai and in Sanskrit as kṛttikā), which always coincides with the full moon or comes one or two days before or after it. On this day a beacon light or dīpam (popularly spelt as deepam) is lit on the summit of the holy mountain Arunachala, at the foot of which lies the temple-town of Tiruvannamalai, where Bhagavan Sri Ramana lived for the last fifty-four years of his bodily life.
On Kārttikai Deepam day in 1931 (called prajōtpatti in Hindu calendars, the fifth year in the 60-year Jupiter cycle), which was 24th November, when answering some questions on the subject Sri Ramana explained the tattva — the truth, reality or inner significance — of Arunachala, and his explanation was immediately recorded by Sri Muruganar in a Tamil verse entitled ஸ்ரீ அருணாசல தத்துவம் (Śrī Aruṇāchala Tattuvam), which is as follows:
புத்தியகங் காரம் புலம்பெய்த வோங்கு
மத்தியித யந்தான் மறையவனு மாலு
நத்தவறி யாது நலங்குலைய வன்னார்
மத்தியொளி ரண்ணா மலையினது மெய்யே.
buddhiyahaṅ kāram pulambeyda vōṅgu
maddhiyida yandāṉ maṟaiyavaṉu mālu
nattavaṟi yādu nalaṅgulaiya vaṉṉār
maddhiyoḷi raṇṇā malaiyiṉadu meyyē.