Almost correct! 95% in my opinion. You are connecting the present to a long time ago past. That is the Present Perfect verb. Like this: "I have found that the highest position is God's satisfaction." We call it "perfect" because the action started perfectly in the past. No stopping, no changing, no problems, I hope you understand. Let me know.

No it doesn't make sense. Do you mean, "Belief in God is the highest knowledge, and reaching this position is the highest happiness."