In what cases should never be tried?
Attempts should not be made unless one is well aware of the cases in which the attempt may lead to death.
Attempts should not be made in cases where there is a possibility of loss of trust or credibility in the attempt.
Efforts which produce terrible intoxication should not be attempted. For example, taking heroin, taking pathedine, etc.
Attempts that hurt religious sentiments should not be made.
Efforts that destroy family or social ties should not be undertaken.
Attempts should not be made without knowing the outcome of the effort.
Attempts should not be made where the result is less than the effort.
Finally - You should not make unauthorized attempts - like you are not allowed to enter important army installations - but you want to enter - so it cannot be attempted.
Attempts may not be made in cases where you are not eligible to compete – eg: national team player.
Don't try to hurt others to get ahead of yourself.