Why is it praiseworthy if practiced by God?

The Catholic Answers

It is praiseworthy to safeguard justice, and yet at the same time to exhibit untold love and mercy. Christ is God. Mercifully He took a human nature, and in that human nature expiated the sins of all those who wish to avail themselves of His generosity by fulfilling the conditions He appointed.

Radio Replies Volume 1 by Rev. Dr. Leslie Rumble MSC and Rev. Charles Mortimer Carty