“Some Chasidim used to say: ‘We study the secret lore, learn about the existence of other worlds, angels, seraphs, and heavenly beings.
But we don’t see any angels or heavenly beings, and we don’t believe that anyone who studies more is able to see more.
Nevertheless, the difference between the one who studies and the one who does not study is that, in the future, when these things are made manifest, the one who studies will be able to recognize them better, to relate them to what he has learned.'”
–Rabbi Adin Steinsaltz
From “God in the World” p. 254-255, in The Long Shorter Way by Rabbi Adin Steinsaltz