Ethical conduct in the form of right speech, right livelihood and right effort are considered to be vital practices leading to enlightenment in Buddhism or Buddhahood.
studybuddhism.com
en.wikipedia.org
Ethical conduct is also emphasized in the religious philosophies of Hinduism, Jainism and Sufism for attaining enlightenment.
This itself is a refutation of the nihilist and existentialist premise that life is meaningless and all values and virtues are but abstract mental contrivances without any relevance of their own.
The Three Trainings
Noble Eightfold Path - Wikipedia
Ethical conduct is also emphasized in the religious philosophies of Hinduism, Jainism and Sufism for attaining enlightenment.
This itself is a refutation of the nihilist and existentialist premise that life is meaningless and all values and virtues are but abstract mental contrivances without any relevance of their own.