Final answer:
Frederick Douglass contrasts the respect typically given to different life stages with the humiliating treatment during slave valuations, highlighting slavery's brutalizing effects on everyone involved.
Step-by-step explanation:
When Douglass speaks of "silvery-headed age and sprightly youth, maids and matrons, had to undergo the same indelicate inspection," he is contrasting the natural respect and dignity typically afforded to individuals across different stages of life and gender in society, with the dehumanizing equality of degradation imposed by the slave valuation process. Through the juxtaposition of what should be respected age and vigor of youth, he highlights the brutalizing effects of slavery that strip away all decency and reduce human beings, regardless of their age or status, to mere property on par with livestock.
This not only underscores the gravity of slavery's impact on the human spirit but also reflects the moral degradation it inflicts on the slaveholders who conduct such inspections. Douglass uses impactful imagery to convey these contrasts, aiming to elicit empathy and awareness of the inhumane conditions slaves face, and the moral corruption inherent in the institution of slavery that affects both the enslaved and the enslavers.