Kate Tempest started out when she was 16, rapping at strangers on night busses and pestering mc's to let her on the mic at raves. Ten years later she is a published playwright, poet and respected recording artist.
Here's a snippet from the video above:

Look, if all these people were prophets,
We’d profit.
We were born with the truth but then we
Lost it in logic so go and find it.
Remind yourself of the timeless
because you are the planet that bred you.
And you are the language that led you.
And you are the knowledge that fed you.
So just own it.