"requirements are reasonable and just. He will not accept less of us than He claims; all His righteous demands must be fully met, or they will testify against us that we are weighed in the balances and found wanting. But Jesus watches our efforts with the deepest interest. He knows that men with all the infirmities of humanity are doing His work, and He notes their failures and discouragements with the tenderest pity. But the failures and defects might be far less than they are. If we will move in harmony with heaven, ministering angels will work with us and crown our efforts with success. 5T 420.2"
"TEKEL; Thou art weighed in the balances, and art found wanting."
The phrase "weighed in the balances and found wanting" is a direct quote from Daniel 5:27, making this an explicit allusion.