Sleepy conscience isn’t the right phrase to describe what I feel was Mark Twain’s way of saying some social mores are ridiculous. If I find a societal ‘tradition’ invalid for me (such as a marriage certificate or raising my kids on good old-fashioned lies) then my conscience doesn’t have to be sleepy to allow me to have the ideal life; I discard it. In some cases, when the tradition is deeply ingrained even while you realize that it doesn’t make sense, the sleepy conscience becomes a necessity to prevent mental turmoil.
Good friends and books are indispensible, however.