Secret Poscard

This was my raft sketch.Its about our mind.
We came to this world is to find out a right
key to unlock our door.Its easy to get a key
but the problem is which one is the right key?
Sometime we though it was right,
but actually its wrong.

This was my second idea.
I was thinking,do i have any secret?
special secret?i don't think so.
Because I'm kind of the person
who not really have secret.
I will share my secret v others.
Maybe its a funny thing or whatever.
I did have a few secret,but everyone knew it.
So,I'm trying to use this visual to show
i have no secret,everyone can look into me.

After that, i wonder that idea will approve by my
lecturer or not.I devolop another version of the
first idea.Which is the heart lock.
The background shows that the lock was there
quite a long period,so it grows grass,dust and others
on the lock but i will never give up to find my key.