A religious individual may most gloriously carry out his or her own rituals, as a part of his or her cultural identity, but the moment, that person starts to build a wall of separation between the self and the rest of humanity, coaxed by the textual commands of a scripture, the healthy religiousness turns into dangerous fundamentalism, which is a threat to both the self and the society.
When a person believes that a God is truly concerned about the well-being of life on earth, and especially of human life, the belief adorns that person with various positive psychological elements such as emotional stability, in times of distress and a highly functional moral compass. Here this belief has nothing to do with reality whatsoever, rather it serves the evolutionary purpose of self-preservation.
The argument against faith is all based upon the rigorous analysis of the scriptures, and not upon the objective observation of the actual individual sensation of faith. Historical experiences of the Kingdom of God gave rise to all the scriptures in the world, but the scriptures themselves don’t account for the actual globally prevalent psychological element of faith or divinity in the human mind. Faith is a natural evolutionary trait of the human mind, selected by Mother Nature as an internal coping-mechanism.
The theory of the relations between states and churches is bound up with the theory of Toleratio, and on that suject the eighteenth century scarcely rose above an intermittend, embarrassed, and unscientific view. For religious liberty is composed of the properties both of religion and of liberty, and one of its factors never became an object of disinterested observation among actual leaders of opinion. They preferred the argument of doubt to the argument of certitude, and sought to defeat intolerance by casting out revelation as they had defeated the persecution of witches by casting out the devil. There remained a flaw in their liberalism, for liberty apart from belief is liberty with a good deal of the substance taken out of it. The problem is less complicated and the solution less radical and less profound.