This was a general feeling for Paul as a missionary. Anxiety often results in depression, and both of these are most unpleasant emotions that distress us. Not only is anxiety unpleasant, but it also has negative consequences in our lives. Wealth may not be a problem in the lives of missionaries, but the worries of life may well make them unfruitful. We will consider other things the Bible says about anxiety later.
Some people report feeling anxious all their lives, others just for several months or years.
Stress often makes anxiety worse. You can control the level of your anxiety, but you must remember that some anxiety is a normal part of life, and you have to deal with it as it arises, perhaps on a daily basis. The list of things that can cause anxiety is nearly endless. Sometimes the cause is rather specific, such as the fear of a specific illness like malaria. Other times you may feel anxious and have no idea why.