Should you not work out if you are sore from a previous workout?

Some soreness is OK. The body responds to environmental demands by strengthening, but only if it is challanged. A good workout should result in some soreness (within reason) and ideally workouts wil undergo "intervals" of hard and easy day work outs. This is the best way to strenthen your body. Don't be afraid of "soreness". However beware overdoing it. Find a good balance.