The issue between Christianity and psychology is not a matter of faith vs. reason. It is rather a matter of epistemological justification - what ways of knowing are valid.
If God can be known in prayer, which he can, then most any knowledge received from God by means of prayer is justifiably valid, for it is hinged on the reality of the human capacity to be in relationship with God.
Further, the epistemology of Christianity is not only one, it is three fold. By witness, by reason, by the Spirit, the last making it antithetical to psychology by its very nature.
If you would like to evaluate a Christian, don’t, for he is already condemned to insanity by you before you even try.
Christians must not be subject to the same psychological evaluations as others, but rather be regarded and evaluated in ulterior ways.
Further, every act must be prompted by a non hallucinatory stimulus, lest the person be regarded as insane. However, true Christians have stimuli in their lives that are unknowable to most of the world and must respond to them - God, angels, demons, heaven, hell, the future foreseen, etc.
Put all the stimuli together, and the Christian’s behavior becomes uninterpretable, making immunity to psychological evaluations necessary.
It is not like having a new star in mind that others have not yet discovered or seen, rather it is like having that star within your chest, in your heart, beating and speaking of eternal beauty and cautioning against sins and darknesses for your own survival.