All 3 Uses

conviction
in
Harriet Tubman, by Petry
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It seemed to her amazing that a white man, free, independent, should have held such strong convictions on the subject of slavery that he was willing to risk his life in order that slaves should be free.†
Chpt 20 *
This incident of the master's death following so swiftly after her reiterated plea, Kill him, Lord, left her with the conviction that prayer was always answered.†
Chpt 8
In the letter he not only expressed his own conviction that the Fugitive Slave Law was wrong, but he eloquently expressed the refusal of the Abolitionists to obey the law: "....I am not a man who loves violence; I respect the sacredness of human life, but this I say, solemnly, that I will do all in my power to rescue any fugitive slave from the hands of any officer who attempts to return him to bondage......I will do it as readily as I would lift a man out of the water, or pluck him from the teeth of a wolf, or snatch him from the hands of a murderer.†
Chpt 12

Definitions:

(1) (conviction as in: spoke with conviction)
a strong, firmly held belief
(2) (conviction as in: owed a fine after the conviction)
a court's finding that someone is guilty