"The precious time that should be spent in speaking of the Saviour's power to save . . ." Yes. "More about Jesus . . . "
That is paradoxical.
The Jews were celebrating the Passover at the very time they were crucifying Christ. Their profession did not agree with actions.
It can be like wanting to spend precious time speaking about the Saviour's power to save while rejection the prophecies that tell us that the clock is running down and failing to be ready to meet Him.
That is the parable of the 10 virgins in action.