Making a difference

I was watching this really corny TV-show 7th Heaven (yea, shame on me, it's embarrassing) and this episode was about the difference Reverend Camden had made in all these people's lives. And that got me wondering: Are we all just "living around", doing our daily things and care about nothing but ourselves? Or are we making a difference just by thinking we do?

No great deeds on my record so far. Maybe I helped an old lady crossing the street, found someone who was lost and lent an ear more often than not. But does that count? Did it really change anything? At all?

Do I make a difference in my job? I want to believe that yes, that I'm enabling people to do something that they normally couldn't. But then does it really matter if that's me or somebody else? Or is that the wrong way of looking at it?

I want to make a difference, with big actions or little ones. But do I?