"At my age, I don't buy but a half a loaf of bread, you know?"

This quote by Merle Haggard is most likely describing the truth that he is getting older and does not need to purchase as much food as he utilized to. He is suggesting that he does not need to buy a full loaf of bread anymore because he doesn't eat as much as he utilized to. This could be due to a decline in hunger, or because he is trying to conserve money. It might likewise be a metaphor for how he is living his life now that he is older. He is taking things one step at a time and not trying to do too much simultaneously. He is bearing in mind his age and taking things gradually. This quote is a suggestion to us all to be conscious of our age and to take things one step at a time.