How to tell the difference between saintly miracles and satanic magick?

I mean yeah, one comes from God and the other comes from Satan, but you can't exactly tell where they got it from just by looking at it, can ye? Joan of Arc is proof of that. I suppose you could ask, but the Satanic sorcerer is just going to lie and say he got it from God (or maybe Satan lied to him and said he was God).

How about the nature of the powers? Yeah, not really.

Witches allegedly sit on the top of water instead of sinking because its pureness rejects their wickedness or something, but Jesus can walk on the top of the water too, and he's fricking Jesus.

Magic powers identified with witches by manuscripts on the topic of finding witches include:

✠ Bilocation (also used by St. Anthony of Padua, St. Gerard Majella, St. Pio of Pietrelcina, St. Severus of Ravenna, St. Ambrose of Milan, and St. Martin de Porres)

✠ Projecting a ghost version of themselves (also used by Paul the Apostle)

✠ Flying around unaided (also used by St. Bessarion of Egypt, St. Mary of Egypt, St. Francis of Assisi, St. Alphonsus Liguori, St. Joseph of Cupertino, St. Teresa of Avila, St. Martín de Porres, and St. Seraphim of Sarov)

Additionally, the following powers are forbidden in the Bible itself:

✠ Divination (basically *every* prophet, although they called it "prophecy")

✠ Raising the dead (used by Jesus again, St. Francis Xavier, St. Patrick, St. John Bosco, St. Catherine of Siena, St. Teresa of Avila, St. Elizabeth of Hungary, St. Rose of Lima, and the Prophet Ezekiel with his army of skeletons)

So how do you tell?