Selfish (adjective)
Holding one’s own self-interest as the standard for decision making.
Selfish (adjective)
Having regard for oneself above others’ well-being.
Selfless (adjective)
Having, exhibiting or motivated by no concern for oneself but for others; unselfish.
“In a selfless act of gratitude for saving his mother’s life, Peter committed to giving money to his local breast cancer charity each year for the rest of his life.”
Wiktionary
Selfless (adjective)
concerned more with the needs and wishes of others than with one’s own; unselfish
“an act of selfless devotion”
Oxford Dictionary