Truly, most of us waste time away without realizing what we are letting go of. It is only time, which has the power to make us reunite with ourselves. You might be wondering as to why am I bringing time here, it is because of your first two verses;

Yellow as sunlight in the morning, twenty years old
Tossing and turning, William is a brave soul.

It kind of gives off the impression that time here plays the major game. Even from your further discussion, I felt that TIME is what we are losing, the purposelessness and lack of wisdom, eventually derails us from time, doesn't it? So, I think.