(My note: This passage of the book is translated by me from the original Czech version, so there might be some mistakes. The page may not match the original either).
The last masterpiece, Reconciliation, page 171
“The most difficult moment when working with the shadow is to admit in its conclusion: “Not only I’m like that, but I can also be like that”. It means that we not only accept our shadow, but even begin to love it. This is the culmination of work that will bring us a huge reward.
In this difficult exercise, where we have to accept our dark sides and lovingly accept them, we come across the basic principle of Christianity: “Love your neighbor as yourself.” Many have circumvented the dilemma that lies in it by, in essence, turning it into the complete opposite: “Love your neighbor above all things,” but they are hopelessly failing and just cultivating a bad conscience. But whoever takes Christ and his teachings seriously in this (original) sentence must begin to love himself in order to have a chance with his neighbor at all. Indeed, the teachings of the Master are much more realistic and more feasible than what they have made of them.”