Scripture memory is like spiritual WD-40
In the 50’s a company in San Diego set out to develop rust-prevention solvents and degreasers for use in the aerospace industry. Its 40th try produced the perfect Water Displacement solution, hence, WD 40. Convair, an aerospace contractor, first used WD-40® to protect the outer skin of the Atlas Missile from rust and corrosion. It keeps water and dust away, prevents rust, and keeps parts moving smoothly. Basically, it keeps the bad stuff out, stops corrosion, and keeps things running smoothly. Memorizing scripture does the same thing.
https://www.wd40.com/myths-legends-fun-facts/