Re: motives

Today Pastor Raymond made a point in his sermon that challenged what I said in my previous post about not really being able to do bad when you're doing good by having wrong motives. He said, basically, that motive is everything... which is like, the total opposite of what I had thought.
Anyway, on further reflection, I think he is right when it comes to doctriney-theology-stuff. I was flipping through Matthew and reached the part in Chaper 5 about adultery, where Jesus says, "You have heard that it was said, 'Do not commit adultery.' But I tell you that anyone who looks at a woman lustfully has already committed adultery with her in his heart." In that way, a man who even thinks about a woman lustfully, without even doing anything to express this, is already guilty of lust. So it's pretty clear that God looks at the heart, and the reason for what we do. The way that we approach Him in worship matters.
On a human relational level, I felt that motive matters less. Does it matter whether somebody helps me because they're trying to be kind, or because they think I'm an idiot? Is it important if somebody donated to charity out of good will or out of their own self-seeking aim for glory?
But using the... err... transitive.. property? (I certainly hope, but somehow doubt, that I'm applying this properly.) If our heart matters in the way we worship God... and... everything we do should be an act of worship... I guess motives matter in everything that we do.
So, to amend my statement, I will just leave it at that we are not in a place to judge other people's motives for doing things (such as the two hypothetical dilemmas I posed), but we should have our hearts in the right place when we ... do things.
...I am way too tired to write.