Gate and Tower

It's true the tower stands strong,
But sometimes it's stubbornly wrong.
The gate, if open wide,
Lets all take shelter inside.
The tower does not want all.
Yet the gate cannot cease its call.
With every space full inside,
The tower collapsed and died.
The gate now left alone
Let our a chilling moan;
To be alone was not
The future she had sought.
The hill with rubble strewn,
Beneath a frowning moon;
The people all dispersed,
The land around them cursed--
"Come to me, my friend;
The tower must rise again!"