This is something that's hard to measure and quantify.<p>That said, you may be trying to make an impact on someone and never get to see the fruit of it in your lifetime. Those kind words of encouragement, that smile, that mentoring session... they could seem like they're of no effect, and falling on deaf ears.<p>You never know. It might be days/months/years down the road, and that person recalls their interaction with you, and something take root in their life, and change happens.<p>If you're trying to make an impact, and you're only satisfied by what you see right now in front you, you may be sorely disappointed.<p>@nougatine - you say "none whatsoever". I beg to differ, friend. You may be having a <i>tremendous</i> impact, and may never get to see it.<p>I would encourage any of you who happen to read this, to take a long view, and act with that in mind. It's totally possible for you to have a HUGE impact on someone and never get to see it.<p>Hopefully, this will temper our interactions with people.