The connection:

We are all part of a greater whole, a much larger circle than we may be aware of. Everything you do has the capacity to touch, even change, someone's life. Many times you do not know the effect you have on a person, you are just being you. Sometimes, you are blessed to have that person express their gratitude, sometimes you are not. 

We need to be aware of how we are interacting and communicating with the world for this very reason. Sarcasm and flippancy are extremely overworked, they show a lack of self-esteem, actually, but they show the world ignorance. 

"They" say that things said or done may come back to haunt you, and that may be true; but I think the positive effect one has on other, just doing what they do, is the most extraordinary. Small things: giving your place in line to someone with one or two items, allowing them to move forward faster, giving your cart to the next person with the quarter/dollar still in it, random acts of kindness, have a vast effect on people and their morale. You can make someone's day, by doing something that appears insignificant to you. Recognize the clerk, be polite, say thank you. Everyone has their own problems and you really don't need to be one of them. 

Look beyond the exterior of each person you meet, everyone has a story, and you never really know who you are talking to, or what impression you will leave with them.. forever! 

And, of course, this kindness does not exclude the people in your own family or inner circle. Although it's hard to believe, most people are kinder to strangers than the ones they love, be aware of this. The respect and love is just as, if not more, important at home as in the street.

So, the long and the short of it is: be kind to each other, pay attention to what you are saying, go out of your way once in awhile and do something for someone else. Create your own legacy. Love is all you need.