The imagination of a boy is healthy, and the mature imagination of a man is healthy; but there is a space of life between, in which the soul is in a ferment, the character undecided, the way of life uncertain, the ambition thicksighted: thence proceeds mawkishness, and the thousand bitters which those men I speak of must necessarily taste in going over the following pages.

What It Means

This is a placeholder explanation generated by the low-overhead model. It interprets "The imagination of a boy is healthy, and the mature imagination of a man is healthy; but there is a space of life between, in which the soul is in a ferment, the character undecided, the way of life uncertain, the ambition thicksighted: thence proceeds mawkishness, and the thousand bitters which those men I speak of must necessarily taste in going over the following pages." in the context of "Preface" to mean that wisdom is timeless.