The fifth line offers the hexagram's clearest image of good fortune. Legge renders it as a simple lad without experience, adding that there will be good fortune. Read against the fourth line's chained isolation, the fifth line shows inexperience held very differently: not confined and worsening, but open, unguarded, and genuinely receptive to whatever instruction reaches it.
This is the central place of the upper trigram Gen, the position commentary tradition treats as the height of the hexagram's own path, analogous to the ruling fifth line elsewhere in the system but expressing authority here through openness rather than command. The lad's simplicity is not treated as a deficiency to be hidden; it is treated as the very quality that allows real instruction to take hold, since a mind not yet fixed in its own errors has nothing to unlearn before learning something true.
Chinese commentary reads this line as the hexagram's answer to its own name: youthful folly, so long as it remains willing to be taught, is not truly folly at all but simply the natural condition of anyone still learning. The good fortune promised belongs less to any particular achievement and more to a disposition, openness maintained honestly, that the line treats as more valuable at this stage than any premature claim to competence.