The authorities had condemned him to a humiliating, painful death. Many onlookers had just watched--not voicing agreement with what was happening but saying nothing in protest. But other witnesses, powerful people and soldiers, had mocked him. Even one of the criminals condemned to the same punishment derided him in the same terms as the others had, "If you're the Messiah, then start saving."
The first dissenter to the scoffing and mocking is the other criminal who is being crucified with him that day. "We deserve this punishment because we have done what they have accused us of doing. This man has done nothing wrong." He then addresses Jesus directly, "Remember me when you come into your kingdom"
Jesus had not responded to the leaders or soldiers or the criminal who kept deriding him. But, he does respond now, "Truly I tell you, today you will be with me in Paradise." Jesus has not done anything to prevent his death that day, but death is not the end of life.
Converted that day was the Centurion. Or, had he already been converted? (See Luke 7:6-10.)