They also both gave excellent account of customs.
The only thing I want to contribute is that this phrase goes back to a
Biblical phrase--it is the famous statement that Avigayil said to David to
prevent him from killing Naval unnecessarily (who died anyway of natural
causes). See Sam 1:25:29. The point of the story is that because David (we)
believe in eternal life we therefore don't regard as so important the
insults of this world and this encourages us to abstain from sin.
In general many customs have Biblical roots and a study of stories leads to
a greater appreciation of the customs.
Hope this helps appreciate this (beautiful) Sefardic Minhag
Russell Jay Hendel; RHendel @ Mcs Drexel Edu