Keep an open mind when you are deciphering what a card means.
4 Pents could just as easily mean that you need to maintain your physical body, giving it square meals, etc... or as others mentioned, that it's becoming stagnant, not moving, slightly constipated.
The cards are going to change meanings depending on what you are reading about. Sometimes tarot can be quite literal and some times metaphorical... that a tight hold on security also shuts out the rest of the world.
To me it can simply mean having or developing the basic elements you need, to maintain what you have.