Not the ultimate definition, agreed, but pretty high on my list!
The logic of this depends on whether or not Christian doctrine is true.
If the Bible is just a fairy tale, then the most likely explanation for the universe is probably naturalism, in which case we can believe that life on earth is all that matters, and the Nietschean superman and his “will to power” is a good example of what the ideal life might be. In other words, achievement through merit is of primary importance.
But if Jesus Christ really did rise from the dead and Holy Scripture is true, then nothing we do on earth—actions, work, merit—has any primary meaning. Everything is defined by what we believe and earthly achievement is only secondary.