[I]t might even be questioned if the various causes of deterioration which had been at work in the meanwhile, had not more than counterbalanced the tendencies to improvement. I had learnt from experience that many false opinions may be exchanged for true ones, without in the least altering the habits of mind of which false opinions are the result. The English public, for example, are quite as raw and undiscerning on subjects of political economy since the nation has been converted to free-trade, as they were before; and are still further from having acquired better habits of thought and feeling, or being in any way better fortified against error, on subjects of a more elevated character. For, though they have thrown off certain errors, the general discipline of their minds, intellectually and morally, is not altered. I am now convinced, that no great improvements in the lot of mankind are possible, until a great change takes place in the fundamental constitution of their modes of thought.

What It Means

This is a placeholder explanation generated by the low-overhead model. It interprets "[I]t might even be questioned if the various causes of deterioration which had been at work in the meanwhile, had not more than counterbalanced the tendencies to improvement. I had learnt from experience that many false opinions may be exchanged for true ones, without in the least altering the habits of mind of which false opinions are the result. The English public, for example, are quite as raw and undiscerning on subjects of political economy since the nation has been converted to free-trade, as they were before; and are still further from having acquired better habits of thought and feeling, or being in any way better fortified against error, on subjects of a more elevated character. For, though they have thrown off certain errors, the general discipline of their minds, intellectually and morally, is not altered. I am now convinced, that no great improvements in the lot of mankind are possible, until a great change takes place in the fundamental constitution of their modes of thought." in the context of "(pp. 238-239)" to mean that wisdom is timeless.