Why Tsarnaev deserves the mercy of a life sentence

His defense attorneys are expected to argue that Tsarnaev deserves a life sentence because he admits the crime, that he was 19 years old at the time, and that he was under the influence of his older brother and perhaps even influenced by his alleged drug use. These points are all debatable but they at least hint at the main reason for imposing a life sentence. A degree of mercy might open the possibility over time that Tsarnaev will renounce his crime and plea for others not to kill in the name of misguided jihad, as he did.

If Tsarnaev does repent and reform, it will not be because he expects to be set free. His life sentence will come with no parole. Any repentance could only be from the heart, and thus all the more effective in potentially persuading others not to follow his example.

The mercy of imposing a life sentence in this case might eventually be seen by Tsarnaev as an expression of grace, which is a powerful antidote to sin. “Go and sin no more,” said Jesus to the adulteress after not condemning her and persuading others not to condemn her and to stone her to death.