More controversially, Majlesi defined "science" very narrowly as "knowledge of the clear, secure "ayat"; of the religious duties and obligations which God has fixed in His Justice; and of the Prophetic Traditions (Hadith), which are valid until the day of Resurrection." Beyond this, he warned, the seeking of knowledge is "a waste of one's life," and worse would "generally lead to apostasy and heresy, in which case the likelihood of salvation is remote." He opposed the school of mystical philosophy developed by Mir Damad and Mulla Sadra, who argued that the Quran was always open to reinterpretation, and valued insights that came from intuition and ecstasy rather than reason.