What are 3 examples of the evils of slavery other than physical violence in Douglass's Narrative?

Slavery is unjust and wrong simply because it violates the
rights of freedom of the slave. This may be further accompanied by many kind of
physical, economical and mental abuses of slaves that cannot be justified any of the
moral or religious codes widely accepted in the world. However in addition to the
injustice to the slaves, the slavery has many evil influences on the whole
society.

Slavery, to begin with, strikes at the root of the
idea of equality of men. Once the society stops believing in general principle of
equality and justice, the conflict for gaining benefit for oneself at the cost of others
is sure to extend much beyond to take advantage of only slaves. The existence of slavery
makes insensitive toward freedom and right of others and in this way promotes disharmony
in the world.

Slavery promotes arrogance and insensitivity
among the slave owners. This kind of behavior is usually not limited to interaction with
slaves. In this way slavery turns the masters of slaves in ineffective human
beings.

Slave masters once used to accept slavery in any
form. have reduced ability to fight against slavery or domination by others. Thus slave
masters are likely to show reduced resistance to attacks on their own liberty and honour
by other powerful people.

Slave are justified by the owners
of slaves on the grounds of their need for labour or manpower. But now it has been well
established that slavery is a very infective way of getting the best output from the
people. Thus slaves are not even an economic means of getting people to do
work.

My last point is controversial. But I believe in it
so I will include it here. Slavery leads to reduces the happiness and mental peace of
the slave owners because of their reduced ability to appreciate and receive the joy of
giving service and being useful to others.