Speak true, speak what is pleasant to others. don't tell truth which is not pleasant
(which is harmful) (similarly) even though pleasant, don't speak false, this is Darmah. You will find this "eshah dharmah sanatanah" in many subgashitas normally this is kept at the end. to emphasize on what poet is trying to say. other such part is "iti smrtah", "iti nishchayah" etc.
Lakshman, This Golden Lanka does not allure me. Mother and Motherland is dearer to me even than heaven. This 'Shloka' is from the conversation between Lord Shree Ram and Lakshmana in 'Valmiki Ramayana'. It is very appropriate to remember the shloka on the occasion of Vijayadashami. Over six thousand years ago, after the great Victory over Ravana, on the day of Vijayadashami, Lord Shree Ram tells Lakshmana that He was not interested in the wealth of Lanka and did never want to rule Lanka. He would rather go back to His Motherland. Later 'Vibheeshana' was made the king of Lanka.
Enmity ends with death. our job is over. (Now) he(rAvaNa) is mine as he is yours. so do his cremation properly. These are sentences of ShriRAma after the death of rAvaNa on vijayA dashami. This reflects our sanskriti.
As rAvaNa was dead, his brother Vibhishana was hesitating for cremation. According to him rAvaNa's body was not worthy of proper treatment. to this our shrirAma says, now that he is dead, he is not our enemy and deserves proper sanskara.