Just to name a couple off the top of my head. Actually I think the straw that broke the camel's back was when one of the pastor's at the church I was attending made an elaborate chart calculating how many people are "going to Hell" in the city, as his sermon for the day.
I regard Christianity and ancient mysticism generally as a manner of speaking about the experience of expanding moral awareness or ego development, using the cultural framework of certain times and places. As such, it is valid and psychologically true. For example, in Jane Loevinger's research, she differentiates eight major stages (with some ambiguity and overlap between any two obviously) for the development of ego (other models refer to this as "moral awareness" and ultimately it traces back to the pioneering research of Jean Piaget). This same sort of shifting in moral awareness and ego development is under the surface in the writings of ancient Christians (whether one looks at Paul's letters, the Gospels or the Gnostic writings).
I would add that people can regress in their sense of themselves, with stress, depression and substance abuse, for example.
Here are Loevenger's stages (and there are other models):
Infancy
* Presocial
* beginning ego
* Not Differentiated from the World
* Symbiotic
* Self-Nonself Differentiation
* Stability of Objects
Impulsive
* Curbed by Restraints, Rewards & Punishments
* Others are Seen as What They Can Give
* "Nice to Me" or "Mean to Me"
* Present-Centred
* Physical but not Psychological Causation
Self-Protective
* Anticipates Rewards & Punishments
* First Self-Control
* "Don’t Get Caught"
* Externalize Blame
* Opportunistic Hedonism
Conformist
* Take in Rules of the Group
* No Self Apart from Others
* Other’s Disapproval is Sanction
* Not Only Fear of Punishment
* Rules and Norms not Distinguished
* Rejects Out-Group
* Stereotypes Roles
* Security = Belonging
* Behaviours Judged Externally not by Intentions
Self-Aware
* Self Distinct from Norms & Expectations
* First Inner Life
* Banal Feelings Always in Reference to Others
* Pseudo-Trait Conceptions
* Modal Stage of Adults
Conscientious
* Goals and Ideals
* Sense of Responsibility
* Rules are Internalized
* Guilt is From Hurting Another, not Breaking Rules
* Having Self Apart from Group
* Standards are Self-Chosen
* Traits are Part of Rich Interior World
* Standards Distinguished from Manners
* Motives and not Just Actions
* Sees Self from Other Point of View
Individualistic
* Distancing from Role Identities
* Subjective Experience as Opposed to Objective Reality
* Greater Tolerance of Self & Others
* Relationships Cause Dependency
* Awareness of Inner Conflict
* Inner Reality Vs. Outward Appearance
* Psychological Causality and Development
Autonomous
* Inner Conflicts of Needs Vs Duties
* Polarity, Complexity, Multiple Facets
* Integrate Ideas
* Tolerate Ambiguity
* Freeing from Conscience
* Concern for Emotional Interdependence
* Integrates Different Identities
* Self-Fulfillment
* How They Function in Different Roles
Integrated
* Transcendence of Conflicts
* Self-Actualizing
* Fully Worked Out Identity
Your pastor, if he takes that sort of thinking to heart would be somewhere in between "self-protective" and "conformist." Your typical everyday Christians who don't obsess over Heaven/Hell or right belief and just want to make their world a little bit better place probably fall in between "self-aware" and "conscientious." Great visionaries, mystics and artists would tend to be in the "autonomous" and "integrated" stages.
I don't think you can will yourself to move from one to other. Nor can you convince someone who isn't already making such a move. This movement across ego stages is primarily aesthetic. The morality and reasoning compatible with the the asthetics of self as the ego develops only follows the development, it does not lead it.
The same religious symbolism and stories mean something completely different to people at different stages. Jesus's crucifixion for example means something very different to a "self-protective" person than it does to a "conscientious" person than it does to an "autonomous" person. Even if they sit in the same Church pew and sing the same hymns, they aren't really engaging in the same religious practices.
When an individual makes a big leap in their ego development, it may appear that the mythological and symbolic tools one was working with will initially seem to be childish things and that they are now more of an adult. And at a later stage, they may come back and find those childish things weren't so childish after all. Religious symbols cannot for any length of time be used in a way that is inconsistent with the way a person feels and thinks about his or her self.
So one might at some point realize a profound wisdom in "Row, Row, Row Your Boat" even though they have previously discarded it as childish.