On the way back, the fire destroyed his beautiful wings and the smoke from the fire got into his throat, thus messing up his beautiful voice.
Thus, they were not special anymore. When he returned he only thought of making his friends warm and never thought of how he wasn’t beautiful anymore.
So, coming back to the question, you should be selfless and care about others dear to you.
This is the no.1 lesson from Itachi’s life…
The rest are-
- Don’t judge others based on your own preconceptions and looks