What happens to works done to show people how much we can accomplish?

Works performed to display how much we can accomplish count for nothing before the judgment seat of Christ. They are not rewarded, because God weighs motive rather than quantity or human recognition, and such works are described as wood, hay, and stubble.

Les explains that believers will be judged for what they have done during their earthly sojourn, but the issue is not so much how much they have done as the motivation behind it. If the only reason a person taught was to show people what he knows, or if works are done to show people how much we can accomplish, they count for nothing. Such works are nothing more than wood, hay, and stubble. By contrast, when the motive is love for the Lord and the desire that He receive the glory, the work counts for reward. Les connects this to II Corinthians 5:10, where every believer must appear before the judgment seat of Christ to receive what is done in the body, whether good or bad, and notes that this judgment is only for believers, not unbelievers.

1 Corinthians 3:12

Now if any man build upon this foundation gold, silver, precious stones, wood, hay, stubble;

See the rest

What motivates works that will count for reward at the judgment seat of Christ?

At the judgment seat of Christ, works count for reward when the motive is love for the Lord and the desire that He receive the glory. The issue is not how much is done but why it is done; self-exalting efforts count for nothing.