Well the ability of man is based on if you believe in him or not. If you don’t believe in his then the ability of man will no longer be the ability. What makes the ability of man so important is that he is there or prayers and not for fun, you need his help when your stressed or need to pray for your times.
In his "Give Me Liberty or Give Me Death" speech, Henry asserts that fighting against the British is the colonists' best option now. He says that the British soldiers who are in the colonies are not there to protect the colonists, but instead to maintain British rule. He urges his fellow colonists to start a revolution, since they've already been submissive to British rule.
How sound is the logic is basically like saying how reasonable or justified and concrete is the logic