Avoiding innovations and instead following approved tradition

In matters of spirituality, one should avoid innovations and adhere to established Catholic tradition. Otherwise, the devil might inspire practices that lead the soul into occultism or other harmful paths.

1 Peter 5:8: “Stay clear-minded and watch carefully. Your enemy, the devil, moves around like a roaring lion, looking for someone to destroy.”

Saint John of the Cross: “… one may hold it as a general rule that a soul goes astray only by following its own inclinations, its tastes, its reasonings, and its personal ideas… inclining it toward what is not fitting for the service of God.”

See John Cassian’s Conference on Discretion