Faith isn’t in the mind or a feeling, but a revelation within of the inner level of the soul’s essence, when its natural development is not distorted.
Rav Kook, Articles “HaRaiyah,” 70
All pessimism comes from uncertainty and doubt, when one thinks that our corporeal life is all that exists.
Rav Kook, Articles “HaRaiyah,” 69
There is one commandment: to attain the Creator’s greatness through examining the works of the great Kabbalists, in order to attain all the worlds and everything inhabiting them.
Rabbi Chaim Vital, Otzrot Haim, Chapter “Shmot,” p.57