Strict Justice

How shall we understand this quote from the pen of inspiration?

The plea may be made that a loving Father would not see His children suffering the punishment of God by fire while He had the power to relieve them. But God would, for the good of His subjects and for their safety, punish the transgressor. God does not work on the plan of man. He can do infinite justice that man has no right to do before his fellow man. Noah would have displeased God to have drowned one of the scoffers and mockers
that harassed him, but God drowned the vast world. Lot would have had no right to inflict punishment on his sons-in-law, but God would do it in strict justice.--Ms 5, 1876, pp. 1-3. (12MR 208,209)