You will have to take care that the spirit of the time, and the wickedness and apathy of the people, do not engender in you a bitter spirit.

William Q Judge
One of the Masters of Wisdom that HPB knew gave the basic virtues needed for an aspirant to divine wisdom or theosophia:

"Behold the Truth before you: a clean life, an open mind, a pure heart, an eager intellect, an unveiled spiritual perception, a brotherliness for one's co-disciple, a readiness to give and receive advice and instruction, a loyal sense of duty to the Teacher, a willing obedience to the behests of TRUTH, once we have placed our confidence in and believe that Teacher to be in possession of it; a courageous endurance of personal injustice, a brave declaration of principles, a valiant defense of those who are unjustly attacked, and a constant eye to the ideal of human progression and perfection which the Secret Science (Gupta-Vidyā) depicts - these are the golden stairs up the steps of which the learner may climb to the temple of Divine Wisdom."

Sanskrit - Gupta-vidyā [from gupta from the verbal root gup to conceal, preserve + vidyā knowledge, wisdom].
Secret knowledge, secret wisdom; the source of all religions and philosophies known to the world: theosophy, the ancient wisdom-religion, the esoteric philosophy.