In every warrior's training, a little rain must fall. I would love to tell students that throughout their training career they will only experience fun, excitement, joy and happiness. The truth of the matter is that at some point every person is confronted with some adversity and will have some difficulty at some time or another.
Some people are very smart intellectually and will struggle physically. Some people are very gifted physically but will struggle mentally or emotionally. Some people get hurt while some people hurt others. Regardless everyone struggles with something.
The obstacles that we encounter are the training. Our struggles are our truths and thus the Way is in the struggle.
If everyone struggles, then what should they do when that happens? Here are some general suggestions for people when we find that we are struggling.
Be patient. Learn to push yourself. Find other ways to train yourself. Learn to forgive. Seek out help. Believe. Trust. And most of all don't give up.
I could elaborate on each of these but I am choosing not to. Think of them as koans for your personal growth. If you can come up with your own definitions or elaborations for the suggestions above you will have solved your own problems and you will come to understand that the struggle is the Way.