2 sentences

1. 这种损人利己的心理极其卑下。

   zhè zhǒng sǔn​rén​lì​jǐ de xīn​lǐ jí​qí bēi​xià.

   This mentality of benefiting oneself at the expense of others is extremely base.

   Source: Dong Chinese Dictionary

2. 他这种损人利己的行为，早晚会自食其果。

   tā zhè zhǒng sǔn​rén​lì​jǐ de xíng​wéi, zǎo​wǎn huì zì​shí​qí​guǒ.

   His behavior of benefiting himself at others' expense will eventually come back to haunt him.

   Source: Dong Chinese Dictionary