Jeff Goldblum's character, Dr Ian Malcolm, in Jurassic Park sums up much that I feel about the progress of science
"your scientists were so preoccupied with whether or not they could that they didn't stop to think if they should".
says it all for me
On a much less profound note the line I personally quote most, comes from the wonderfully coarse "Bridesmaids"
" I want to apologise, I'm not even confident which end that came out of "
take your pick !