"..the self-knowledge that I am talking about is concrete, verifiable and is tangible like science itself and completely understandable in rational terms."

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If you walked by a street and you was walking a concrete and you saw a rose growing from concrete, even if it had messed up petals and it was a little to the side you would marvel at just seeing a rose grow through concrete. So way is it that when you see some ghetto kid grow out of the dirtiest circumstance and he can talk and he can sit across the room and make you cry, make you laugh, all you can talk about is my dirty rose, my dirty stems and how am leaning crooked to the side, u can't even see that I've come up from out of that.

— Tupac Shakur