sense of sacred simplicity
The words are Hand's, I suppose implying his personal idea of what
Sacrosanctum Concilium meant by
'The rites should be distinguished by a noble simplicity. They should be short, clear, and free from useless repetitions. They should be within the peoples' powers of comprehension, and normally should not require much explanation.'
His statement isn't authoritative, particularly since it's a misstatement of the Council's words and I would appreciate someone directing me to what was meant by the council's words.
My impression is that it has primarily meant jettisoning things which were added to the Mass and, speaking honestly, dumbing down. The latter ('normally should not require much explanation') means not a deeper understanding, rather a more superficial exposure.
I have to be cautious with such thinking, because as has been pointed out by folks who understand
me, I have an inclination to snobbishness.