I thought I'd send you over to Heavenly Homemaker's post over here to read some lovely thoughts about heart attitude. It's funny how a seemingly bad situation may not even change, but once our hearts are changed, the situation and circumstances seem so much different.
God can change our heart attitude and thoughts if we want Him to. God can bring us peace and joy in all circumstances. Here's a hint though. It won't change with a "God, change this situation..." prayer or even a "God, change their hearts..." prayer tossed up at Him either. It'll take a humbling of ourselves and a "Place in me a new heart, O God..." prayer that we actually mean. :)
How about you? Do you sometimes need a heart attitude adjustment?