Soreness is normally a sign that you are doing something unfamiliar to your muscles (whether it is a new activity, or just pushing hard/further than normal), not that you are necessarily overdoing things.
If you back off every time you feel soreness, you will never improve.
A rest day once a week or so is good, as it allows your muscles the chance to recover.
And of course, it is important to differentiate between more generalized muscle soreness, and sharper pain that may indicate an injury.
The reasonable man adapts himself to the world; the unreasonable one persists in trying to adapt the world to himself. Therefore all progress depends on the unreasonable man.
| current weight: 178.0