the past;  bygone days;  one's past (that one would prefer remained secret);  past (tense);  preterit;  previous life
 fault;  error;  indiscretion;  faux pas
 to turn one's head;  to look over one's shoulder;  to turn around;  to think back (on);  to reminisce;  to look back (on)
 courage;  bravery;  valour;  valor;  nerve;  boldness
 to stare fixedly at;  to fix one's gaze on;  to make sure of;  to set one's eyes on (e.g. the future);  to focus on
 the future (usually distant);  future tense;  the world to come
 to advance;  to go forward;  to precede;  to go ahead (of);  to make progress;  to improve;  to deepen
 far away;  far off;  far;  long ago;  long before
 the end;  the extremity;  the limit;  the limits;  the result
 -less;  lacking;  non-existing
 journey;  route of a journey
 sometime;  someday;  one day;  some time or other;  the other day;  in due course
 the world;  society;  sphere;  circle;  world-renowned;  world-famous
 twenty-third day of the month;  twenty-three days