From my book “The Shyness & Social Anxiety Workbook” by Martin Antony Ph.D. and Richard Swinson M.D.:
There is no question that when anxiety is too intense it can interfere with performance; however, mild to moderate amounts of anxiety are actually helpful. If you never became even slightly anxious under any circumstance you probably wouldn’t bother doing the things that must be done. Why would you bother eating healthy food if you weren’t concerned about the consequences of not doing it? In part, it is anxiety that motivates us to work hard, prepares us for challenges, and protects us from possible threats…Anxiety and fear have a helpful function in that they prepare you for future threats and protect you from danger. So, your goal should not be to rid yourself of all fear and anxiety. Rather, your goal should be to reduce your anxiety to a level that no longer interferes significantly with your life. page 9
The anxiety about the consequences are reduced by the love and hope of heaven. Hope motivates as well as fear.
The Sufi Mystic Rumi explains the paradox
God turns you from one feeling to another and teaches by means of opposites, so that you will have two wings to fly not one ~~ Rumi - Sufi