Repairman

I was a castle, made of sand,
Made of millions of grains.
I stood guard, proud and tall,
Until I was washed away.
The grains spread out and separated,
My castle walls torn down.
The rooms that I had decorated,
Sent to sea to drown.
Then, planlessly I drifted,
Undesired and ungifted,
Until the ocean shifted,
And a single grain was found.
Then, you rebuilt my castle walls,
And brought me back from sea.
And you sought out to find them all,
The grains that once were me.
Now every time I feel despair,
When I remember washing away,
I know that I can be repaired,
And time can still be made.
So should your castle ever fall,
I'll fix up your broken walls,
And collect your scattered pieces all.
If I have to search the entire sea,
I'll do it for you,
Like you did it for me:
Unconditionally.