Yes, a great point in your reply is always listen to your own body, everyone is different, and always adjust accordingly.
That's not to say Stooges post is incorect, it just may be correct for him, but not for you.
Only way to know for sure is to start a program and adapt to the signs you reciceve from your body, such as soreness, pump, increase in strength, getting sick easily, overly sore etc etc.
You may have to skip a session from time to time, sometimes it may be that your whole body needs rest, esp if your sick (BTW anti-biotics make you weaker when lifting while you take them), but there will be times only a certain bodypart needs rest.
I know this sounds corny, but most people refuse to react to the signs thier body gives when they need rest, you should be proud that you noticed and had enough sence to adjust and do what you had to do. Always listen to the signs your body gives out whether it be good or bad and adjust. Even the best advise is only a starting point, ajusting to hat you need to do is what seperates yourself from people who don't, which in the end is poeple who will keep progressing compared to someone who is on the track to getting a serious injury.