Everyone will have different opinions and interpretations in old sayings like this, but as I have found... I take it to mean that ignorant or so to say, less educated people usually seem happier than those of us who are 'more educated' simply because they do not realise the severity of the situations they put themselves in. A southern sophomore drop out who gets married at 17 and pops out babies every 10 months is happy in her station, but for us on the outside, we know through our experiences that we would never choose that life for ourselves. In her eyes, her ignorance is bliss - she does not see herself as we would see her. And indeed, some of us would envy her happiness. If only we could be so ignorant, perhaps we would be as happy as she, who is barefoot and pregnant walking to her welfare appointments. *Note, this isnt to say all pregnant teenagers are this way, it is only an example. I think that envy does play a part in this saying, for to understand the meaning.