Telling

Why I can smile, and cry behind the smile,
Though none but I will ever see the tears.
I can be jolly, dying all the while
Or hum a happy tune while trouble nears.
A brilliant grin can quite conceal my mind
Which fills with fears instead of happiness,
Concealing heartache in a face unlined
Or even seeming joyous in excess.
I will not lie, but need not be too clear;
When I remain unasked, no one can tell.
I have the necessaries to appear
When most uneasy, as if I were well.
And yet I know behind the smile and grin
You can decipher what true state I'm in.