I have found this not only to be true- but to be an excellent overall guide when making decisions. When considering whether to say or do something, I simply ask myself will doing/saying that create connection or separation with the person/people involved. If the answer is connection- I proceed, if it is separation- I either pass on it or find a way to do it that creates connection. It is when I do not consider this that I tend to create experiences that I regret.
It is also useful in evaluating and learning from past experiences. Did doing/saying that create connection or separation. Next time... I will do more of that, not do that, or approach it differently.
Best wishes connecting with those around you.