Circle of Life, Karma, and Reincarnation

I am astonished of how the rules of life is. Quoting what Elton John wrote in his song "Circle of Life":
From the day we arrive on the planet
And blinking, step into the sun
There's more to be seen than can ever be seen
More to do than can ever be done

Some say eat or be eaten
Some say live and let live
But all are agreed as they join the stampede
You should never take more than you give

In the circle of life
It's the wheel of fortune
It's the leap of faith
It's the band of hope
Till we find our place
On the path unwinding
In the circle, the circle of life

Some of us fall by the wayside
And some of us soar to the stars
And some of us sail through our troubles
And some have to live with the scars

There's far too much to take in here
More to find than can ever be found
But the sun rolling high through the sapphire sky
Keeps great and small on the endless round
Or for me, the other word for it is Karma. I believe that we are live in circle, dot, of things called life. Everything is round and you will never know where is the end. It has no beginning and it has no end. Once you die, someday you will be alive again. So in Buddhist way, later in our reincarnation, we might be rebirth as a more better/ worse luck depends on your deeds during your present life. Aside of it is related with Buddhist religion, I take the good point, that you have to do the rights in order to make your future life also right. Do not only think about the present, set your life far far far away as you can. Be a good person as much as you can. Later you will get the benefit of what you have done.

And I learned in these past months, during my quiet moments, that my life could be only one month, year, or years. Who knows. I was thinking being a youth does not mean you can live freely. You need to be responsible, of your life and your surrounding (family, boyfriend, friends). So I decided to plan my life for next five years ahead, specifically. Therefore, it can help me to remind me how far I have done so far before I reach my end, and before my life will be restarted.

Because you need a goal in your life, therefore you can determine what is happiness of your own.