Your sincere interest in another will warm their heart.
You don't see it yet, but a small gesture or act of kindness by you in the past has made a big impact on someone's life. How many other people have you helped or inspired without even realising it? When we help someone, we usually only remember the moments where we could see a change happen right in front of us in that moment. But we often don't get to see the benefits of the help we give others until much further down the track. If you stop for a moment to think about all of the good deeds that you've done, and the positive energy that you've put out into the world, you might find yourself feeling overwhelmed by just how much of a difference you have made in the world around you.
Be careful. Your meaning could be unclear. Ensure that you re-read any written communication before you send it.