Stress

Stress is something we all deal with on a day to day basis, some Moe than other.  But I have often heard it said that God only gives you as much stress  as you can handle and no more than that.  But is that true.  I have often felt an accumulation of stress in my life that seems insurmountable and many break under the stress.  I have been lucky and have not broken, but many have.
      So I guess my question  for you all is. Do you believe that a person will only experience what they can handle or do you feel that many are faced with hurdles they cannot jump?