I’ve long been a critic of the colloquial use of quotation marks. This is a particular problem in theological writing. Anyone wanting to write something clever or use any form of slang in a theological treatise seems pathologically bound to enclose such phrases in quotation marks. To my mind this nearly always has the effect of making the writer sound like bumbling and silly.
As it turns out Strunk and White have a similar opinion:
“If you use a colloquialism or a slang word of phrase, simply use it; do not draw attention to it by enclosing it in quotation marks. To do so is to put on airs, as though you were inviting the reader to join you in a select society of those who know better.” (The Elements of Style, 34)