Analysis of Lost tune

There is no tune in the song
When was it lost?
The memory nevertheless pursued
The search is just for that.

On the way, while walking and talking
Was the ever-present tune
In the midst of thinking, in everyday work
The heart was full.

By no means unknown, it takes shelter
I thought that today
As much effort, I give
I don't feel like doing anything.

Lost the tune, endlessly
That is no longer the end
Yet around hope, sitting on the shore
I try to cross over.