Y'know, everyone thinks they have good intentions. Have you ever met anyone who said, "I'm here to break stuff and screw the world up"? No, of course not.
I'm thinking you don't actually need good intentions to do good works. Actually, good intentions by themselves don't seem to accomplish much of anything.
Here's the top three virtues I'd look for in someone to actually achieve good things.
Strength is the virtue that's required for all other virtues. If you're not internally strong, you get easily swayed by opinions, social pressure, culture, and things like that. It's hard to hold on to virtues if you're not strong when you're in the crowd.
Reader Daniella just sent this to me, which is quite cool -
I read the Autobiography of Benjamin Franklin a bit back, and I was very impressed with it. This was my second attempt at reading it - the first time, I didn't think it was worth reading since the language was hard to get through and the book was mostly anecdotes that I wasn't getting much from.
What I didn't realize was, the book was written at two very different time periods in Franklin's life. He wrote the first half as kind of a rough set of notes just for his family. Then about 10 years later, he finished it.
The second half of the book is where the gold is. Well, there's a number of interesting points in the first half, but I found the second much more practical and enlightening. Also, he cuts down on the slang and the English modernizes a bit for he second half. I'd recommend it.