他很自私，从来只顾自己的感受。

Tā hěn zìsī, cónglái zhǐ gù zìjǐ de gǎnshòu.

He's very selfish and only ever cares about his own feelings.

人类是自私的。

Rénlèi shì zìsī de.

Human beings are selfish.

他很自私，从不考虑别人的感受。

Tā hěn zìsī, cóngbù kǎolǜ biérén de gǎnshòu.

He is selfish and never considers other people's feelings.