Unconditional good heart toward others is not even a possibility unless we attend to our own demons.
We work on ourselves in order to help others, but also we help others in order to work on ourselves.
Even if you don't feel appreciation, just look. Feel what you feel; take an interest and be curious.
By the way that we think and by the way that we believe in things, in that way our world is created.
The third noble truth says that the cessation of suffering is letting go of holding on to ourselves.