Kadhalum Kadanthu Pogum Tamilyogi -

"காமம் கரஞ்சே கைக்கூடும் கார்மேல் வாரல் யார்க்கும்" (Kāmam karañcē kaikkūṭum Kārmēl vārāl yārkkum)

Or, in a more poetic translation:

"Love and War are equal, O Tamilyogi"

Which roughly translates to: "The heat of love is like the heat of war; both are equal." Kadhalum Kadanthu Pogum Tamilyogi

Here's the text in English:

A Tamil phrase!

"Love and conflict are indistinguishable, O seeker of Tamil knowledge" O seeker of Tamil knowledge"