1) To know aboout the greatness Author - Vakthru Vailakshanyam
2) To know about the greatness of the work - Prabhandha Vailakshanyam
3) To know about the greatness of the message conveyed in the work - Pradhipadhi Vailakshanyam
It is natural that we dont take anything coming from anybody but a "trustable" source. It is true that we do not take everything that comes from the "trustable" source but those that are true. It is also true that we do not get all the messages from the "trustable" source.
So we first start by understanding the Vakthru Vailakshanyam - About Shri. Andal.
Vakthru Vailakshanyam/வக்த்ரு வைலக்ஷண்யம்
Four reasons are told to show the greatness of Aandal by our Poorvacharyas.
Azhwars are 11 in number.
Periyazhwar is one of them.
Periyazhwar's daughter is Aandal.
Andal had given us two Prabhandhams - Naachiyar Thirumozhi and Thiruppavai
Thiruppavai is a Prabhandham which has 30 Paasurams (Slokas) in it.
We are here to understand Vedhas through Andal's Thiruppavai.
Let us start by analyzing something that we know. When we are at sea level, an bus could seem very big in size. But the same bus when compared with a big mountain, will make the size of the bus insignificant when you compare it with the big mountain.
In other words there is a huge difference between a Mountain and a Mole-hill.
The difference between a mountain and a molehill is the difference between Rishi’s and Samsaari’s (Us). Same way is the difference between Aazhwars and Rishis. Same was is the difference between Azhwars and Periyazhwar. And the same way is the difference between Periyazhwar and Aandal.
Everything that we see in this earth has a "Cause". There is no "Effect" without a "Cause", which is also accepted by the Scientific world.
There can be two causes for us to be born in the earth. 1) Based on our deeds (Karma) in the past, 2) Due to the Niruhethuka Krupai of God (Emberuman).
Our forefathers(Poorvachaaryas), have accepted that the birth based on the deeds (Karma Sambandham/கர்ம ஸம்பந்தம்), is inferior to that of the birth based on the Niruhethuka Krupai of Emberuman (Eshwara Sambandham/ஈஶ்வர் ஸம்பந்தம்).
The former is to be avoided, and the later cherished. Those who are born in this world because of their Karma are called "Samsari"(s).
Samsari - Dehadhmabimani/தேஹாத்மாபிமானி - Kooni/கூனி and Kaikeyee/கைகேயீ are cited as examples of these. Why because Kooni wanted to take revenge on Rama for having hit her in his childhood with a catapult. Kaikeyee wanted her son Bharathan to be the King. Both these thoughts are because of Ego (Ahankaram/அஹங்காரம்). We get this ego because of athma's relationship with body.
Rishis are better than Samsaris because Rishis have understood God by their self effort - Karma, Gnana, Bakhti routes (margam/மார்கம்). They have gone through hardships while going through these Margams but have seen God and understood him because of their self efforts.
An example will be Vasishtar in Shri Ramayana. These Rushis understand that the body and athma are not the one and the same. Yet they have understood God because of their self effort.
Azhwars - Those who have seen God because of God's Mercy (Arul/அருள்). They have taken God as their means to attain him and did not do anything on their part to get to him. Azhwars are like Shri. Lakshmanan in Shri Ramayana. They believed like Shri Lakshmana that the purpose of their existence is to be subservient to God and do all that is required by him (Kainkaryaparar/கைங்கர்யபரர்).
Periyazhwar - The only Azhwar who have always been wanting the Glory of God (Mangalasasanam) to go above and above (Samrudhi/ஸம்ருத்தி). Right from his first paasuram "Pallandu Pallandu"/ "பல்லாண்டு பல்லாண்டு", till the last one in Periya Thirumozhi, all that Periyazhwar had preyed for is for Emberuman's Mangalasasanam. While all other Azhwars also had Bhakthi with God, they always wanted to get liberated from this Samsaram. Periyazhwar never asked for anything from God but always was wanting to do Perumal's Mangalasasanam. In Shri Ramayana, Bharathazhwan is cited as an example to Periyazhwar. Bharathan always wanted the well being of Shri Rama. When he heard that Rama was sent to the forest by his mother, he ran behind him and wanted him to come back so he can take the throne to continue from a place where he should be. He was always ready to do what Rama commanded him to do - Paarathanthryam/பாரதந்த்ரியம்.
Aandal - While Azhwars took Bhagavan as the "means" (Upayam/உபாயம்) to attain his Lotus Feet, Aandal considered Periyazhwar as the Upayam to attain Bhagavan's lotus feet. She was more concerened about Bhagavadha Samrudhi/பாகவத ஸம்ருத்தி (Glory to Bhagavadhas - Bhagavadhas are those who always want Glory to God/மங்களாஸாஸனம்).
What Nammazhwar achieved after singing two prabhandhams and 800 slokas in Thiruvaimozhi - to understand that one has to be subserviant to Bhagavadhas as well, Aandal achieved it in the 29th paasuram when she said
Azhwars in their prabhandhams have in many places assumed themselves as female (Anyobadhesam/அன்யோபதேஸம்) when singing the paasruams. They did so so that Purushothaman is the only male as per Sri Vaishnava Sampradhaya and they wanted to get the Arul of Emberuman to flow from the higher ground to lower ground. Aandal didnt need to do this as she was a Female by birth. Naturally Emberuman's Arul flowed on her.
She also had Anyobadesam/அன்யோபதேஸம்(considering oneself as someone else, like a man considering him as a woman or a woman considering her as a man) in the fact that she considered herselves as an Edaichi (one who rears cattle). Being born from a Brahmin family, she acted as if she is an Edaichi. Every activity of her was like that of a girl from a family which rears cattle.
All her actions, her way of speaking, her walk, ever she smelled that of a grazer.
Prabhandha Vailakshanyam/ப்ரபந்த வைலக்ஷண்யம்
We just saw that Aandal was madly in love with Emberuman. She wanted to marry him. But, when she realized that it is impossible for the above reasons, she thought she would at least go to those places and see them and feel happy about it but again that wasn’t also possible.