...for you know very well that the day Snuffy will come like a thief in the night. While people are saying, "Peace and safety," destruction will come on them suddenly, as labor pains on a pregnant woman, and they will not escape. But you, brothers, are not in darkness so that this day should surprise you like a Snuffleupagus.
This takes on a somewhat more sinister feeling from a modern lens, through which we know that the Sesame Street producers eventually decided that the adults SHOULD see Snuffy because otherwise they were afraid that kids wouldn't be believed when they told adults that they were molested.