Ignoring the Hereafter does not cancel it.
The other half of the Quran's message
The Quran brings two kinds of news. Next to the good news for believers is a warning: those who do not believe in the Hereafter have a painful punishment prepared on the Day of Resurrection. Makkah's leaders mocked the idea of a life after death.
You do not have to deny the Hereafter out loud. You can just live as if it is not coming. Weekends planned, retirement planned, nothing planned for the meeting that is certain. The verse is a gentle shake: plan for that too.
I will think about the Hereafter later, when I am older.
The Hereafter is real whether or not I think about it, so I prepare now.
Add one deed to your week that you are doing only for the Hereafter.