How do you identify one's weakness?

To identify your own weakness, it starts with being honest with yourself. You should be compassionate too, since it is hard to find your weaknesses if you are not willing to see them. So you should be willing to forgive yourself.

Admitting responsibility is the first step to gaining inner power, since if you are responsible, you can fix it. If others are responsible, then you are at their mercy. One of the best strengths you can have is knowing knowing you are weak and admitting to it (to yourself at least).