The commonest phrase and gesture the victims of 9/11 heard, felt or expressed in their final hour would have been, without much doubt, "I love you." It is a revered and solemn gift. Yet, many never think to say it or avoid saying it.
Perhaps we mean to say it more, but don't; for a variety of reasons. Sometimes we don't say it because we lack courage or we don't know how to say it in ways we mean it.
It takes a great deal of vulnerability for some to say, "I love you." For others, it's just a matter of making the time and effort. For others, again, it's simply remembering to do it.