Don't take kindness for granted.
I think this is the ultimate form of self absorption. To not show gratitude when someone else does something for you.
I've worked in entertainment for 15 years now.
I still make sure to be full of gratitude for every opportunity I am given. Every time that an expert takes time from their day to explain something to me. Every quality moment I get to spend with another human being.
Gratitude enriches the spirit.
I believe this with all my being.
The world can do everything for you, but if you do not accept it with gratitude and joy, then you are the one that is still left empty at the end.
But kindness and graciousness in this world, at the very least, deserves to be greeted with whatever gratitude you can muster at that time.
Maybe you don't have the strength to smile at that moment. But you can say thank you.
Remember, they could have much more easily walked on by than extended the hand to you. Acknowledge it.
You're heart will be fuller for it.