To be admirable, morality must be its own reward

If people are good only because they fear punishment,
and hope for reward,
then we are a sorry lot indeed.
- Albert Einstein

Power is of two kinds.
One is obtained by the fear of punishment
and the other by acts of love
Power based on love
is a thousand times more effective and permanent
then the one derived from fear of punishment.
- Mohandas (Mahatma) Gandhi

Correcting bad habits cannot be done
by forbidding or punishment.
- Robert Baden-Powell (the founder of scouting)

It is an open question whether any behavior
based on fear of eternal punishment
can be regarded as ethical
or should be regarded as merely cowardly.
- Margaret Mead

Punishment cannot heal spirits, can only break them.
- Barbara Deming

To be admirable, morality must be its own reward.
- Jonathan Lockwood Huie

Further reading:  Finding Peace in Forgiveness

Revenge, the Deadliest Sin?

Anger is Its Own Punishment

Five Perspectives on the Nature of God