918 – “Youth cannot know how age thinks and feels. But old men are guilty if they forget what it was to be young.”

-Albus Dumbledore in J K Rowling’s Harry Potter and The Order of the Phoenix

842 – “Age is foolish and forgetful when it underestimates youth.”

–Albus Dumbledore in J K Rowling’s Harry Potter and the Half-Blood Prince

667 – “Every age hath its own problem, and every soul its particular aspiration. The remedy the world needeth in its present-day afflictions can never be the same as that which a subsequent age may require. Be anxiously concerned with the needs of the age ye live in, and centre your deliberations on its exigencies and requirements.”

–Bahá’u’lláh

214 – “Youth is happy because it has the ability to see beauty. Anyone who keeps the ability to see beauty never grows old.”

–Franz Kafka [attributed]

184 – “Ancora imparo.”

“Yet I am learning.”

–Michelangelo [Misattribution, see link below]