If you want to train yourself by repeatedly exposing your mind to fear of death (and the best part of overcoming it), ie rock climbing is much more approachable

If you want to train yourself by repeatedly exposing your mind to fear of death (and the best part of overcoming it), ie rock climbing is much more approachable way. Your subconscious mind only partially understands the concept of rope and safety it brings, and being few tens of meters above ground puts out some very real emotions and fear of death out, especially when protection placement is quite apart. But you still have equipment that can handle easily 2 tonnes of static load and few of you in worst possible dynamic fall.