The spirit of man, or “our spirit,” gives us the ability to physically function on a level above animals, but we are incomplete without God’s Spirit dwelling within us.
The Roman emperor Constantine the Great convened and played a major role in the Council of Nicaea, which laid the groundwork for acceptance of the Trinity doctrine.
The tendency of human beings to disobey God and exalt themselves indicates selfishness and pride are often the primary motives, rather than a desire to obey God.