There are some who have great difficulty letting go and enjoying. In the Jewish Talmud, it says God will hold us responsible for all the things we didn' t enjoy. In prayer we begin to appreciate the ebb and flow of life by looking at everything with a sense of wonder and awe. Prayer is a wonderful way of maturing and growing. It is also surprising.
Surprises can be stressful.
In prayer we are supported but thrown off balance at the same time. We are thrown off balance often because we try to stop God, when in fact there is no need to stop. In trying to stop inappropriately we throw ourselves off balance. If we kept moving forward, we wouldn' t feel off balance. Another reason we resist prayer in silence and solitude is that we do not want to challenge our own shame.