# I was a blasphemer

"I was a person who spoke evil against Christ." Paul is referring to his character before he was a Christian.

# a persecutor

"a person who persecuted those who believed in Christ"

# violent man

"a person was cruel towards other people." This is a person who believes he has the right to hurt others.

# But I received mercy because I acted ignorantly in unbelief

"But because I did not believe in Jesus, and I did not know what I was doing, I received mercy from Jesus"

# I received mercy

"Jesus showed me mercy" or "Jesus had mercy on me"