Convalescence is the gradual recovery of health and strength after an illness.
Performing something is to show what you have or to show your talent. It is also having confidence in front of lots of people.
The meaning of legs on a stage is so that the stage can be higher
GFR stage 2 is mild chronic kidney disease.
The meaning is basically that the world is just like a play, relating a man's life to the life of a play.
it means an early stage