The Lazarus quote also highlights how the demands that are made upon us can also create stress. The very uncertainty of if we will be able to cope with these demands creates pressure. This is a very natural fear of the unknown. New experiences and demands can be stressful. We don't know just what is round the corner, and we worry about this.On the other hand, maybe you know exactly what's round the corner and you're not sure how you will cope with it. To go back to the example of the person faced with the pile of work, perhaps he or she didn't cope well with it last time, leading to doubt and anxiety about what will happen this time round. Often if we have a bad experience we are influenced by it and almost expect history to repeat itself, setting up negative expectations.
Stress is a medical condition and it can have a serious effect on your health. If you think you are suffering from stress it is crucial that you consult a medical professional.