Yiddish quote:
When children are young; their parents talk about how smart they are; when parents are old, their children talk about how stupid they are. Ven di kinder zaynen yung, dertselyn di eltern zeyere khokhmes; ven di eltern zaynen alt dertselyn di kinder zeyere narishkaytn.
Oy vey iz mir, may they stay young! May we all stay young(ish).
And another one for all:
Time is more precious than money. Di tsayt iz tayerer fun gelt.