Sin x and phenomenon

Anyone still recall their secondary maths? And can draw the graph of Sin x?

If we look at the Sin x graph, we will realise that it can apply to life. To alot of happenings in our life.

Take for example, happiness.
When we get a promotion or a raise, our happiness level rises. But yet over time, the happiness that was derived from that promotion decreases, and our happiness level falls back to zero (or normal). Than time comes for our bonus. Happiness rises again. Bonus money is all spent, happiness falls. Good performance appraisal, happiness rises. Put down by the boss, happiness falls. Rises and falls, rises and falls.....

Isn't that just like a Sin x graph. If we were to scrutinise the Sin x graph, we will realise that all falls back to zero, to the "normalised" level.

In such a case, why do we bother to place emphasis on chasing that promotion, that raise, that perfect condo, etc.
It is just like the diminishing marginal returns. It all falls back to zero at the end of the day. As such, I do not see the need to be attached. Attached to what is happening in the external world. Attached to the material, to the physical.

In a similiar fashion, Sin x can be applied to all phenomenon.
All phenomenon rises and falls.

When you see the pen, the pen "exists", and the pen "phenomenon" rises. The pen is out of sight, no longer in use, the pen no longer "exists", the pen "phenomenon" falls. [ok, this is not a good example]

When we watch movies, do we realise that it is actually made up of frames. Frames by frames, which when moving in a fast speed, make it seem like there is movement. Each frame can be viewed as a phenomenon. It arises, and than falls. But because we are so used to the movement, we assume that it is always there. But that is not exactly the case. Once that frame has past, it has fallen away, and is gone.

And that is applicable to all of life, all the phenomenon. Everything rises and falls away.
So is there a need to be attached to anything?

I challenge you to find something that defies the rising and falling of phenomenon.