It does not...
It does not, however, mean that it was not possible for him to continue to live and he, therefore, chose to be martyred. What is meant is that he could not find any prospect for the existence of religion and the Islamic ummah except by means of sacred revolution.
He concluded that if he wanted the Muslim ummah to live, and there should be a Muslim ummah in the world, he himself must be sacrificed and his dear ones like Zaynab, Umme Kulthum, Fatima bintul Husayn and Ali bin Husayn (Peace be upon them) who were the greatest and the most eloquent orators of the world of Islam should continue Imam Husayn's mission by inviting the attention of the Muslim ummah to its shameful condition, in the bazaars of Iraq and Syria, to deliver the Muslim nation permanently from the danger of death and annihilation, and to keep alive the sacred movements which were started before Husayn bin Ali and open a smooth path for the future religious movements of the Muslims.
After Walid bin Utbah, the Governor of Madina, tried to coerce the Imam under the orders of the caliph of the time to submit and take oath of allegiance, and the incident of the night of 28th Rajab took place, the Imam did not take the oath of allegiance and deferred his final decision to the following day. Thereafter Abdullah bin Zubayr got alarmed and ran away from Madina on the following day, but the Imam stayed on in Madina.
On that day he came out of his house to find out whether there was any fresh news. Marwan bin Hakam met him on the street and said to him during the course of their conversation: "Sir, I am your well-wisher. You should hear me and listen to what I say". The Imam replied: "Let me know what you have to say. If it is something good for me I shall surely accept it". Marwan said: "I suggest that you should take the oath of allegiance to Yazid.
This will be beneficial to your world as well as to your faith (i.e. if you recognize Yazid as the caliph, Imam and leader of the Muslim nation, and endorse his leadership of the Muslims of the world, you will preserve your faith as well as your worldly interests, but in case you do not take the oath to him, and oppose him, you will destroy your faith and the world will also slip away from your hands)." The Imam said in reply to these presumptuous words of Marwan: "We are from Allah and to Him we shall all return." (Surah al-Baqarah, 2:156).
This verse is usually recited to console ourselves or others when a calamity befalls us.