If I could, I would

it's about a person who will do anything for his/her love if only he/she could

If I could make a rainbow
And erase all the shadows
In your heart, for your happiness
I would, with willingness

If I could run so fast
And bring back the past
I would change where you are
For you to go far

If I could wipe all your tears
If I could fight all your fears
I would do all of these
For you to be at ease

But I know I couldn't
Cause I'm not that great
I'm only a human being
That's why I can't do such thing