Meister Eckhart (the most prominent Rhineland mystic) was tried for heresy.
And never declared a heretic, merely a series of propositions alleged about his theology that he denied ever espousing in his trial. His own order, the Dominicans, never regarded him as a heretic. Neither did his followers, two of whom were beatified and a much later one Nicholas of Cusa, who read Eckhart’s works, became the most powerful cardinal in the catholic church during the 14th century, as well as a mystic himself.
Blessed Pope John Paul II held him in high regard:
“…I think of the marvellous history of Rheno-Flemish mysticism of the thirteenth and especially of the fourteenth centuries… Did not Eckhart teach his disciples: “All that God asks you most pressingly is to go out of yourself … and let God be God in you” [cf Walshe Sermon 13b]? One could think that in separating himself from creatures the mystic leaves his brother humanity behind. The same Eckhart affirms that on the contrary the mystic is marvellously present to them on the only level where he can truly reach them, that is, in God.’…”
- Blessed Pope John Paul II, in “Ecclesiastical Mission of Adrienne Speyr” (1987)
From a CAF apologist:
Question: I have read a bit of M. Eckhart because I feel attracted to mystical works (St. John if the Cross, Teresa of Avila). I understand that he is considered a heretic.
Answer from Fr. Vincent Serpa:
Meister Eckhart was a Dominican like me and is no heretic.
forums.catholic-questions.org/showthread.php?t=80878
The apologetics part of this website even recommends him for the purposes of missionary activity:
catholic.com/quickquestio…izing-a-taoist
I suspect that your friend is attracted to the mystical and philosophical aspects of Taoism. It could be that his own Christian tradition is devoid of these. Perhaps you could whet his appetite with the writings of some of our Catholic mystics. I would recommend the work of Meister Eckhart whose work develops themes that are congruent with Taoism but also thoroughly Christian.
(the most prominent Spansih mystic) was perscuted .
Yes by reactionary elements within his own Carmelite Order who resisted his and St. Teresa’s reforms, not by the Magisterium nor a heresy tribunal. His incarceration had nothing to do with mysticism. He was then canonized and declared a Doctor of the Church, making your argument very weak on this score.
Masur-Al-Hallaj (one of the most prominent Sufi mystics) was persecuted. And Jesus himself was persecuted.
An isolated incident and a period not replicated until modernity. The first Sufis have been proven to be ascetic Muslims trying to escape the pomp and luxury of the Abbasid Caliphate (then the world’s most powerful state) by living solitary, holy lives in the desert. These early Islamic mystics were named ‘world renouncers’ [zuhhad].They meditated on the Qur’an and repeated the dhikr, invoking the Names of Allah. Then over time some Sufis wrote down their devotional exercises beginning in the 9th century. Niffari, Tirmidhi and Bayazid are famous early Sufis and all of them were devout Muslims. Now, there was an Islamic version of the Inquisition around this time, called the Minha, which tried to suppress the non-mystical Mutazili rationalist heretics, however as a secondary purpose the state also executed Al-Hallaj, who declared identity with God (“I am Allah”). However in the twelfth century the orthodox Muslim jurist Al-Ghazali reconciled Sufi Islam, which by this time was popular among masses of ordinary Muslims, with the orthodox tenets of the Ulema. Thus, Sufism became an accepted part of Islam until the rise of fundamentalist Wahhabism in the 19th century.
Rumi - the most famous of the Sufi mystics who wrote the Masnavi, a world classic of Sufi poetry - remained a devout Islamic scholar and jurist after his first mystical experience, adhering to the Hanafi school. His family carried this legacy on.
seekersguidance.org/ans-blog/2012/04/26/what-do-classical-scholars-say-about-jalal-al-din-al-rumi/
Mawlana Jalal al-Din al-Rumi (d. 672 h.) was a recognized scholar of the Hanafi school, as were his father, son, and grandson, all being jurists of the highest caliber, as well as an Imam of the science of self-purification (ihsan).
In his compendium of Hanafi scholars, Abu’l Wafa’ al-Qurshi (d. 696 h.) introduces him as someone “knowledgeable of the [Hanafi] school, possessing vast understanding of juridical matters, thoroughly knowledgeable of juridical differences and other types of sciences.” [Jawahir al-Mudiyya]
Similarly, Ibn Qutlubugha (d. 879 h.), the great Hanafi jurist, stated in his Taj al-Tarajim after mentioning Mawlana Rumi’s lineage back to our liege=lord Abu Bakr (Allah be well pleased with him) that “he was knowledgeable of the legal schools, differences of opinion, and various types of sciences… and he composed many lines of poetry.”…
Perhaps more noteworthy than all of the above are the biographical notices on his son, Baha’ al-Din Ahmad, who was described in Ibn Hajar `Asqalani’s Durar al-Kamina as, “one of the Imams of the Hanafi Masters, brilliant, ascetic, pious, a jurist, scholar of legal methodology (usul), and grammarian…” and by al-Qurshi in his Jawahir as an “Imam… who followed his father in leaving the world behind.”…
All of this goes to show that Mawlana Jalal al-Din was nothing but an orthodox Sunni scholar who not only mastered the outward sciences but actualized the inward as well. May Allah be well-pleaed with him and those who followed him.