When we see the signs and ignore them, we can't blame others for the results of our choices.
If it was our job to testify about something really important, could we persuade the rest of the courtroom of the truth?
We may look forward to something better in eternity, but this doesn't replace the work required of us here on earth, first.
Once we realize our sinful situation, the reason for Jesus' death to pay for our sins becomes clear. However, why is His subsequent resurrection so important?