How do you know you are after the right thing?

How do i know I am after the right thing? On my quest for success, I know I am after the right thing when; it is not for selfish gain, when i am not doing it to outclass a friend, when my doing it does not put another in harms way and finally, when it helps others at the end of the journey, then i am after the right thing.

 How do you know you are after the right thing?

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