If how we profoundly analyze on living things, every living objective has three main systems and those three systems automatically or naturally came from its own origin.

Three systems of living thing: 1 living system, 2 protection system and 3 reproduction system.

The first topic; the living system of living is not difficult to know that the animals, human being, insects and plaints have livelihood or digest system and they really need water, food, oxygen, temperature and so on. Hence, all of them are living conditions for living beings. If there is no one of them, the living beings are not be able to live in this universal for a moment.

The second topic; the protection system of living things is very interesting it extremely important for living beings, we must know about it properly, because of the most people don’t know about it, some people misunderstood on this case, and there is also very strong relationship between the Dharma practice and this subject as well.

 Here, let me show you some examples that some animals such loin, tiger, leopard and other many of cat family animals have long tusks and toenails, for what those animals are possessed with long tusks and toenails? You know, those are special things for fighting with other enemy and defending their own bodies in successfully. Similarly, some living beings have horns, long nose and so forth.

The most insects including snacks have poison for challenge to other its enemies, some creatures can bite to its enemies in dangerously and some animals, insects, birds can’t to challenge to the enemy but they have much speed for running away from their enemy.

Now, you look at earlier human beings, they can use many different tools or weapons for protecting their own bodies and families, in current centuries, the human beings can make a much more powerful weapons for protecting their own families and countries but they are not using those weapons for just protection they are using for destroying to other people and country.

If you ask me about the protection of plaints, I would like to tell you a short story which really happened on me. When I was young, at the age of around fourteen, my family was very poor, so I had not to wore shoes and clothes, my mother always advised me like this “if you go out side, look around be carefully, otherwise it is possible to bite you by some inserts.”

 One day, although it was getting dark in the evening I went out side of our house, at that time, I suddenly felt a pain on my lift foot, I thought, oh! some one had certainly bitten me, then immediately, I called to my mother to help me, she quickly came to see me there “ what happened, are you ok?” she said, she was holding a small lamp in her hand and lighted to me, then we looked around there with light of lame but nothing else there, we saw only some kind of plaints in around there, the plaints as having sharp thorns like a needles, after that time, we went back home and I contemplated on that case for an hour, then I realized what happened on my foot, and main cause of the painful hurt of my foot. It was happened a crucial situation with the plaint which small living being was bit on my foot.

If it had not bitten me, I had possibly damaged or broke it. That means it was bit me and protected by itself. Hence, even the plaints are also can protect by themselves, If you profoundly analyze on that small plaint, it will be found the three systems; living, protecting and reproduction.            

However, as I earlier mentioned, all of them are protection system for living beings. Evermore, every living being is living in a group or their families and males or husbands are much stronger or more powerful than females because, males have to take much more responsibility than females to challenge to other enemies and protect their own families. 

We can see that every living object is wishing to live in the group of same kind of being, so it is showing a reason clearly that the social unity is psychologically important and necessary for living beings, they need to live with protection, and livelihoods in a same kind of group.

Most of the livings beings are naturally protecting their own bodies with the same colors of environment, For example, the US solders are wearing clothes with same cooler of environment when they are engaging in to the war.

Reason why? Because, they would not be see by enemies or it is very difficult to kill them by enemies. Similarly, Most of the livings insects are naturally possess the same colors of environment, if it was changed the environmental colors the insects colors also might be change immediately, how is it? 

The third topic; the reproduction system of living things, significant value of living things, evolution of organisms are very interesting event, and constantly continuing in this world.   Every living beings; human, animals, birds, insects,

Plaints, viruses and bacteria are constantly reproducing by themselves in order to hold the lineage of them. It is the main goal and functional responsibility of the living things to be reproducing and continuing their own qualities in successfully.

 Probably every living beings can’t be reproduce when they are very young and very old because during of the young age, it is the time for accumulating all the conditions of reproduction and getting the age old is final time for supporting and preservation to the reproductions which they reproduced at the ages of their middle life. Every living being of male has sperm, females have eggs and they need sperm eggs for reproducing their own bodies’ lineages.

At the age of middle life the sperms and eggs are increasing and coming up to the connection of different sex.  Those are coming automatically in the bodies of living beings and natural activities of living elements. The elements from the bodies of male and females are very clear, when they are getting close and interviewing, they are changing into the different shapes and checking each other whether it could be able to reproduce in their life. 

Look every where, view around us, go every where, all living objects or beings what we can see in this world are just reproduction or copy of previous living things so if the reproduction system is not exist in this planet, then it is impossible the living things including us in this planet.

If there is no a reproduction system in our bodies, it is impossible the living beings in any where, how can you say about the rebirth of all sentient beings?  Is it continuing the living being by reproduction? Is it continuing the living being by the rebirth?  What is the main purpose of our lives? Why we were born in this world? His Holiness the 14 Dalai Lama says; the main purpose of our lives is happiness, I think, we can say that every sentient being emotionally wish to achieve the happiness

but it is not a natural purpose of living beings. The natural purpose of living being is every living being will be able to give a reproduction in successfully as well.     
If you say that the living beings are taking rebirth after the death by the subtle compounded thing, subtle namshe (mental consciousness) and subtle wind.  Where is the namshe (mental consciousness)? And how to it can take a rebirth? We have to pay more attention on this essential point. 

I will write more about it.