What famous activist said this " and don't ever say the sky is the limit when there are footprints on the moon"?

Song lyrics, not a "famous activist." Note the lines in the SECOND VERSE:

Artist/Band: Brandt Paul
Lyrics for Song: There's A World Out There
Lyrics for Album: That's The Truth

When I was a boy
I'd get so annoyed
Whenever it was pouring rain
Standin' at the glass door
Starin' at the outside nose pressed against the pane
I told my momma
I don't wanna be stuck inside no more
Give me thunder and lightnin', somethin' excitin'
That's what I'm livin' for

There's a world out there and I wanna be in it
I got a life and I'm gonna live it
Don't tell me the sky's the limit
There's footprints on the moon
I wanna do my walkin' down the road less traveled
Sew my dreams where they won't unravel
If you play it safe you won't get nowhere
I can't stay in here when there's a world out there

I remember back in school
They thought I was a fool
For askin' Lizzy Walker to the dance
She was always with the captain of the football team
Nobody thought I even have a chance
But imagine my surprise
When she looked me in the eyes
And said I'll go with you instead
I knew we'd be together for the rest of forever
When Lizzy looked at me and said
Hey baby

There's a world out there and I wanna be in it
I got a life and I'm gonna live it
Don't tell me the sky's the limit
There's footprints on the moon
I wanna do my walkin' down the road less traveled
Sew my dreams where they won't unravel
If you play it safe you won't get nowhere
I can't stay in here when there's a world out there

I imagine when they land on a brand new planet
In some far off galaxy
Somebody in the rocket's gonna look out the window
Feeling just like Lizzy and me

There's a world out there and I wanna be in it
I got a life and I'm gonna live it
Don't tell me the sky's the limit
There's footprints on the moon
I wanna do my walkin' down the road less traveled
Sew my dreams where they won't unravel
If you play it safe you won't get nowhere
I can't stay in here when there's a world out there

If you play it safe you won't get nowhere
You can't stay in here when there's a world out there

(No, I just can't do it)
There's a world out there
(Don't even try and play it safe)
No, no, no
(You're not gonna get anywhere)
No, no, no

http://www.cowboylyrics.com/lyrics/brand…

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