motivation of doubts

Sometimes I wonder, is there any boundary between right and wrong, good and evil. Is good derived from evil as an alternative which are more acceptable by society; or good really sever the true value of goodness, unconditioned, without asking for any benefit in return. As I often see, many people believe in gods because they believe that gods will protect them; being good because good will return...so it's like an investment, which doesn't hold the true value of goodness any more. As I'm mentioning this, is because I want to help a friend but I'm not sure why I want to help her. Is it solely the act of friendship or is there any other purposes going through my mind. ... ..