Annai oththa arut kuru vaagiya
Minnai oththa ramaNa mei vedhiyan
Thannai kaNdavar thammai marapparae
Ponn = gold; oththa = like, similar to; poruppu = hill; soNai = Arunachala (golden hill); annai = mother; arut kuru (aruL guru) = grace guru; minnai = lightning like; mei = truth (also body); vedhiyan: lord, essence, meaning, of the Vedas; marapparae = (they will) forget themselves.
In the golden hill of Arunachala, he sits like a caring, loving mother bestowing his grace on all those who seek him. Those who see his lightning like form will forget themselves.
Comparing God to mother is quite common. Lord Shiva is known as Thaayumanavan meaning One who also became a mother. (Thaai = mother, thaayum = also mother, aanavan = one who became) Implying he already is the father now he is also the mother. There is a temple in Tiruchi for Thayumanava Swamy. The story is that there was a pious woman who was a great Shiva devotee on the other side of the river Cauvery (the temple was on this side of the river). Every day the woman would visit the temple and offer her prayers. This continued even when she was pregnant. One day, after her prayers, she saw that the river was swollen and started flooding, making it impassable. While waiting for the flood to subside she started having labour pains. She desperately wanted to go back home to her mother who lived on the other side of the river Legend has it that the Lord himself came disguised as her mother and helped deliver the baby, then disappeared. (Thus SV continues the theme of seeing Bhagavan as Lord Shiva which he has expressed in Ramana Stuthi Panchakam collection.)
The ‘Tejas’ or the brightness that emanated from Bhagavan, compared to a streak of lightning here (minnai oththa -> min = lightning, oththa - like, similar to) was seen and felt by many devotees. Rajapalayam Ramana Ammal, when she first went to the ashram to have darshan, saw a bright fire burning in his place Dr.TMP Madhavan records how the brightness he saw when he met Bhagavan never diminished. Shantammal, another devotee says, “When I first came to Bhagavan, I saw a bright light, like the sun, with Bhagavan in the midst of it ... On another occasion I saw a big light come out from Bhagavan’s head and fill the hall. In that light everything disappeared, including Bhagavan.” (From Arunachala ramana - Eternal Ocean of Grace).
Seeing this light that is Bhagavan one forgets himself, losing the body consciousness, which is expressed in the last line ‘thammai marappare’.