that everyone who believes in him may have eternal life.
“everyone” is everyone regardless of gender, nationality, class, race, standing, wealth, intelligence, or any other differences.
“believes” is the Greek word pisteuo which means to think to be true; to be persuaded of and then to place one’s confidence in; to trust. This word involves belief in and commitment to that which is believed.
“eternal” is the Greek aionios which means pertaining to an age; to the Jews it would indicate pertaining to the age to come which had no end, thus it means eternal, everlasting, without an end.
“life” is zoe, the absolute fullness of life, the state of one who is possessed of vitality.