I came across a good quote on Google which goes like this –
If a drop of water falls in a lake, there is no identity. But if it falls on a leaf, it shines. Choose the best place where you can shine.
This is so true. A person is of no use to a group where his/her knowledge and intellect is not used, but that person will be useful to a group where his/her expertise can be used.That person will be contributing and shining in the field of their expertise.
Same learning should be applied in our lives. A person should not always be in confused state of what they should do. After evaluating the pros and cons of a situation,they should be able to take decision and stick to it. Once a decision is taken, the person should strive towards achieving their goals.