Monday's Riddle! An Act Unmeasured...

Hello Riddlers! It's that time again! Can you guess the theme this week? I try to be this more than is necessary ; ) ~ F

I am something great that comes from within, an act or deed that inspires a grin. I bring with me a feeling of cheer- lessening the trouble and replacing the fear. I need no thank you, I ask for no pay- I only wish to brighten your day. You'll be amazed when you suddenly see all the good things you can do with me!

What am I?

I gave you a clue!


Clue! FEAR NOT THE UNEXPECTED