Here's a short summary:
If the situation [can be remedied], then there is no need to worry about it. ... The appropriate action is to seek its solution. Then it is clearly more sensible to spend your energy focussing on the solution rather than worrying about the problem. Alternatively, if there is no solution ... then there is also no point in being worried about it, because you cannot do anything about it anyway.
If you are motivated by a wish to help on the basis of kindness, compassion, and respect, then you can carry on any kind of work ... and function more effectively with less fear or worry, not being afraid of what others think or whether you ultimately will be successful in reaching your goal. Even if you fail to achieve your goal, you can feel good about having made the effort. But with a bad motivation, people can praise you or you can achieve goals, but you still will not be happy.
[In order to not be overwhelmed by the difficulties,] it is vital that we make every effort to find a way of lifting our spirits. We can do this by recollecting our good fortune.
[Negative thoughts and emotions - such as hatred, anger, pride, lust, greed, envy] are thus the cause of our destructive behaviour both toward others and to ourselves.
There are many methods [to train the mind] ... It is this pattern of thought [focus on turning adversity to advantage].
... one of the mind’s most marvellous qualities is that it can be transformed... [Those who attempt to transform their minds] will become more disciplined and positive.