Useful simple short article.
https://www.sfr-21.org/human-nature.html
Marx:
“Estranged labour, therefore, turns man’s species-being – both nature and his intellectual species-power – into a being alien to him and a means of his individual existence. It estranges man from his own body, from nature as it exists outside him, from his spiritual essence, his human existence.”
Working for money and not for love changes our nature. We become alien to ourselves, to our bodies and minds. We become alien to to our nature and the world around us. When we are strangers to our creativity we become strangers our own bodies, to nature as it exists outside us, to our spiritual essence and our human existence.