Will the Corinthians stand blameless before God if the Lord returns?
Yes. Paul writes that the Lord will confirm them unto the end, so they may be blameless at His coming. Though the Corinthians had failures and weaknesses, God would present them blameless on the basis of grace, not their own performance.
Les teaches that the Corinthians were just as potentially able to accomplish great things as anybody, waiting for the coming of the Lord Jesus Christ. Paul says God would confirm them unto the end so they might be blameless. Even with all their failures and weaknesses, if the Lord had come a day or two after they received this letter, they would not stand before God shaking in their boots. Paul says they would stand before Him blameless. They were not blameless in themselves, so God could do this only on the basis of grace. Les connects this to eternal security for the true believer, noting a caller who was upset about that teaching.
Who shall also confirm you unto the end, that ye may be blameless in the day of our Lord Jesus Christ.
More Questions
How could the Corinthians stand blameless before God despite their failures?
Even though the Corinthians had many failures and weaknesses and were not practically blameless, they would stand before God blameless if the Lord returned right then, and the basis for this is grace, not their own behavior.