It would seem "dyeing" one's mind by the repetition and reformulation of ideas featured in many ancient spiritual disciplines. Early Christian desert monks, for example, had a concept of "interiorization," which is a step beyond what we would call "memorization": the goal was not simply to recite a psalm, but to steep it so dark in the bones through repetition that it ceased to be the prayer of someone else which you had memorized, but had become your own prayer.
It would seem "dyeing" one's mind by the repetition and reformulation of ideas featured in many ancient spiritual disciplines. Early Christian desert monks, for example, had a concept of "interiorization," which is a step beyond what we would call "memorization": the goal was not simply to recite a psalm, but to steep it so dark in the bones through repetition that it ceased to be the prayer of someone else which you had memorized, but had become your own prayer.