The greatest compliments I have ever received, were for things I never thought twice about doing. Seriously, stupid crap I would do for a complete stranger without a second's hesitation. You need directions? Fine, go here or whatever. By simply being myself, I can make an enormous difference in someone else's life, maybe not in the sense of saving their souls or anything, but in the sense that I can inspire genuine gratitude. Without positive feelings like gratitude, life quickly becomes a nasty downward spiral, while the less I worry about people's motivations for feeling grateful, the more I can inspire them.