Rabbi Chaim Vital discusses the prerequisites for entering spiritual realms and receiving ruach hakodesh, placing the Pardes ascent in the context of a structured path of ethical purification and Kabbalistic preparation.
ואל זה נתכון רבי פנחס בן יאיר במה שאמר (במשנה סוף סוטה) פרישות מביאה לידי טהרה וכו' וקדושה לידי חסידות וחסידות לידי רוח הקדש, כי זו חסידות שלימה הבאה אחר הקדושה והיא המביאה לידי רוח הקדש כי נתדבק בו דבוק גמור וישיג לגלוי רזי תורה ולהתנבא עתידות כמו שאמר רבי מאיר (אבות פ"ו משנה ה') כל העוסק בתורה לשמה, רצונו לומר לשמה של התורה שהיא היא הקדוש ברוך הוא, כי כל התורה שמותיו של הקדוש ברוך הוא. זוכה לדברים הרבה וכו' ומגלין לו רזי תורה ונעשה כמעין המתגבר וכו':
When Rabbi Pinchas ben Yair said, “Caution brings to zeal, zeal brings to cleanliness, cleanliness brings to separateness, separateness brings to purity, purity brings to holiness, holiness brings to fear of sin, fear of sin brings to humility, humility brings to Chassidut, Chassidut brings to the Holy Spirit and the Holy Spirit brings to resurrecting the dead” – he was referring to this. This, specifically, is the perfect Chassidut that follows holiness and leads to the Holy Spirit. Because he totally cleaves to HaShem-יהו"ה, he will merit to attain the revelation of the secrets of Torah and to prophesy about the future. This is as Rabbi Meir said, “Whosoever is occupied in Torah for the sake of its name (that is, for its sake, rather than for his own sake) merits many things. Moreover, the existence of the whole world is worthwhile because of him. He is called friend, beloved, a lover of God, a lover of the creatures, the delight of God and the delight of the creatures. The Torah garbs him in humility and awe. It prepares him to be a Tzaddik, a Chassid, upright and trustworthy. It distances him from sin and brings him close to merit. He benefits others with counsel and wisdom, understanding and strength, as it says, ‘Mine is counsel and wisdom; I am understanding, strength is mine.’ The Torah gives him kingship, governance and penetrating judgment. The secrets of the Torah are revealed to him. He becomes like an overflowing spring and like an ever-flowing river. He becomes modest, long-suffering and forgiving of insults. The Torah magnifies him and elevates him above all things.” Moreover, when Rabbi Meir said, “For its name (Lishmah-לשמה),” he meant for the “Name” of the Torah, in that it is the Torah of HaShem-יהו"ה, that is, the name of the Holy One, blessed is He, in that the entire Torah is composed of the names and titles of HaShem-יהו"ה, the Holy One, blessed is He.