"because the ancient Romans had done that when life became unbearable"

In Ancient Rome and Greece, unlike in later Christian doctrine, committing suicide was not always morally wrong. Instead suicide could be an act of honour in some circumstances. In the face of defeat in battle, a soldier could kill himself to cheat the enemy of victory against him and avoid torture or enslavement. Cleopatra, Brutus and Antony are notable ancient figures who committed suicide. Forced suicide was a means of execution reserved for noblemen. Socrates, who had condemned suicide, was forced to drink hemlock for corrupting the youth of Athens. Bloodletting, the deliberate withdrawal of significant volumes of blood from an individual, was (and continued  to be into the 19th century) a common means of treating the ill and based on the belief that the body was composed of four ‘humours’ that needed to be properly balanced.