Conversation so far:
What is the first life of Raven?
Raven is a Cambion; half-human/half-demon daughter of interdimensional demon Trigon and Gotham City–born human Angela Roth (known as Arella). Raven was conceived as the result of Trigon's marriage to Arella.
What was Raven's home Azarath like?
Raven grew up in an alternate dimension called Azarath with pacifistic inhabitants whose spiritual leader was the mystic Azar (Pagon).
Why did Raven have to control her emotions?
She was taught to control her emotions by Azar in order to suppress her inherited demonic powers.
What else happened to Raven in the first life time besides controlling emotions, birth and Azarath?
During this time, Raven rarely saw her mother and grew detached from her. Upon Azar's death, Arella began the task of raising and teaching Raven.
What about Raven's father?
Around this same time, she met her father face to face for the first time.

Question: What did he teach her?
Self-contained rewrite: What did Raven's father teach Raven?