Lyric discussion by ColliFlower 

I agree with the above, but offer the more straightforward (I feel) explanation that photosynthesising is about be about being plant-like in quality. In other words, essentially having your life stand still while the world goes by around you. You are firmly rooted in a rut-like state where you, however unintentionally, refuse to acknowledge adventure or risk - As the drunen Wester13 said "just getting energy from the sun" but "don't really live a life".

*drunken.

macfarlanerd - I'm not sure that's exactly what he means, but nice out-of-the-box thinking.

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