Under long-lasting extreme pressure and high temperature, a pack of Carbon can turn into shining and firm diamond.
If you inflate a balloon excessively, the balloon will explode.
Excessive stress can build up your inner strength. Extreme exaltation may make you generate wrong sense of self; afterwards you will receive unbearable internal and external pressure.
Some excellent people were destroyed not by extreme pressure but by unreasonable exaltation which they were incapable to handle.