 So, coming back to the fourth aspect of happiness that is called Sukhayu Hitayu. You can read little more on this aspect of Ayu and Vaya on the page of this website dharmaviki.org. On this page, author explains the difference between Ayu and Vaya. So, age is English term, but in Sanskrit and many other Indian languages, there are two terms which are commonly used. Ayu and Vaya. Ayu is biological age. Vaya is the corresponding age with the biological age. So, Vaya can be understood in three ways. So, we have a word called Vayu Vraddha. Means, the one who is Vraddha, which is grown up, who is grown up by Vaya. But there are two other kind of elders, Tapovraddha and Gyanavraddha. Tapovraddha, the one who has done sacrifice for the larger purpose and Gyanavraddha, who is who is more knowledgeable. So, Ayu, the quality of Ayu is connected with Hitayu. Sukhayu meaning happy life, Sukh we all know is happiness. This is intertwined with Hitayu. Hitayu means that which is good for others. So, Sukhayu, Hitayu are attained together. If we do not live Hitayu, if our Ayu is not used for the well-being and happiness of others, then it cannot be Sukhayu, it will be Dukhayu, life of misery. So, these are the two definitions of Sukhayu-Hitayu. Sukhayu is defined as Traktayu-Ruktam-Svalakchanato-Yatha-Vidaya-Haiva-Purvadyaya-Cham. Now, there are characteristics of Sukhayu and we will look at these characteristics in the Sandivichet form, so that we can understand this long Sutra word by word. Similarly, Hitayu is defined as Hitaysana-Punarbhutanam-Parasvada-Paratasya-Satyavadina-Sama-Parasthya, etc., etc. So, there are characteristics of the Hitayu. These both factors go together as per the yogic tradition. So, look at Sukhayu. Sukhayu has these characteristics like Sharir, Manasabhyam, Rogabhyam, Anabhidra, Tasya, those whose body and mind are disease-free. So, if they are disease-free, how they will look like? Like youth, youth-like, endowed with youth, Samartha-Anugatha, and it has following things. What are those? Balh, Virya, Yash, Parush, Parakta-Masya, strength, virility, reputation, manliness and courage. Jnana, Vijnana, Indriyartha, Balh, endowed with knowledge, meaning Jnana and Vijnana. That means art and science both. Indriyartha, healthy senses, Artha, object of the sensory perceptions, Balh, ability of the sensory organs, Paramrithi, riches, Ruchir, Vivid, Upabhogasthya, various luxurious articles people can enjoy. Sambraddha Sarvarambhasya, who can achieve what they start? Many of us are good at taking initiatives, not able to achieve, not able to fulfill that. So, that is also one very important factor of Sukhayu, what our ability to complete and finish, what we wish to achieve. Those who can roam as they please, those who are autonomous, who are psychologically independent of moving around. So, these are the characteristics of Sukhayu. Now, look at the characteristics of Hithayu. Parasvadu Paratasya, who do not desire wealth of others. And if you remember the first mantra of Isopanishad also talks about not desiring wealth of others. Satyavadina, who are truthful, Shama Parasya, who are peace-loving, who are self-contained. Pariksha Karinah, those who are thoughtful before taking any action, they do the pariksha, they examine the suitability of their action. Apramatasya, who are not lethargic and who are not laid back, those who are vigilant. Trivargam Parasparenin, we just discussed about dharma, artha, kam. This is called trivargam. Result of this, doing these things well, naturally results into moksha. So, that is not counted here, that is why it is called trivarga. So, trivargam, who experience the three important objectives of life, that is dharma, artha, kam. Anupaham upaseva manasya, without one affecting with others, whatever you do, people will comment. Those who are seriously committed for some good cause, for them as well, some people may comment adversely. So, people having ability to ignore those comments, without not being affected by those comments, that is the characteristic of hitayu. Because if we get too sensitive and touchy about others comments, we will not be able to remain focused on our actual task. Those who respect superiors, those who have gyan, vijnan, upasamasi, let us say, who are endowed with knowledge and humility. Vraddha upasevina, who serve elder, who respect the elders because elders have insights, elders can have experience. They can give something which in terms of knowledge and insights, which you may take years to acquire. Sunayat, who are in full control, Ragh, Rosh, Irsha, Mad, Mahan, Vegasya. So, these likes and dislikes, jealousy, egoisticness, egoism, these things generally come as vague. They come as our dispositions, very fast mental waves, those who have the ability to control these waves. Satatam vibhade pradhan parasya, who constantly indulge in various type of charity, who has the giving attitude. So, we many of us must have heard this term go-getter. The hetayu means not go-getter. Hetayu means go-giver, who is, who has the tendency to keep giving whatever in his or her capacity. So, that is the sign of hetayu. Tapah gyan, prashamam nityasya, those who are regularly engaged in the sacrifice, regularly engaged in meditation, regularly engaged in sadhana. Not those kind of people who go to gym one week and then they stop going. Those who start yogic practices and then they stop after three days, no. The hetayu will not get realized in their life. We need to have commitment and consistency. So, those who have this commitment and consistency for the right practices, adhyatma vidh tat parasya, who have the full adhyatmic knowledge, who have the commitment to know their true self and realize how many within. That is the sign of hetayu. Lokam imam cha aamu, aamu chaave chhegana manasya, who work both for the present as well as for the future, who have the long-term perspective and ismrati matimata, who endowed with memory, who do not forget the right teachings, who do not let go their intelligence and clouded by their impulsive tendencies. These are the sign of sukhayu hetayu. And what is the sign of dukhayu and ahetayu? And only one term is given of what Charak says, those who have opposite of it, they get a sukhayu or dukhayu. Or here also, gives the opposite definition in the two words. Ahetayu is the one which has opposite of all this and sukhayu is the one which has opposite of all this. This is the definition of sukhayu and hetayu.