For the poison of hatred seated near the heart doubles the burden for the one who suffers the disease; he is burdened with his own sorrow, and groans on seeing another's happiness.

By suffering comes wisdom.

Willingly no one chooses the yoke of slavery.

The will was of Zeus, the hand of Hephaestus.

When a man's willing and eager the god's join in.

Married love between man and woman is bigger than oaths guarded by right of nature.

It is through suffering that learning comes.