When we respond by saying "Amen," we are essentially stating, "What you have said is indeed true," and thereby we are not only concurring with what was said and expressing our own faith, but also reinforcing the other person's statement and strengthening the other person's faith.
In fact, according to Jewish law, one may do such forms of temporary preservation for the honor of the deceased.
(Today this is done much less invasively with refrigeration.) There is further a debate in the Midrash if Joseph erred in embalming his father (even if it was this more minor procedure).
try to behave in a way that will result in people having greater respect for and trust in God.
With stories and insights, Rabbi Twerski's new book Twerski on Machzor makes Rosh Hashanah prayers more meaningful.
On the other hand, when we behave in the manner which God wishes, the result is - bringing glory and honor to God, and strengthening people's faith.