One part that struck me is a passage where Martha (the married woman who had the relationship with Gandhi) is talking to one of her disapproving, and maybe somewhat jealous, daughters.
"No it's just that you children are still young, and the young are forever ready to criticize. When you are older" she predicted, "you'll learn that it's our flaws that make us what we are and, in the end, make us even more lovely and worth forgiving."
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The inside cover of the book has a quote in a similar vein -
"The essence of being human is that one does not seek perfection, that one is sometimes willing to commit sins for the sake of loyalty, that one does not push asceticism to the point where it makes friendly intercourse impossible, and that one is prepared in the end to be defeated and broken up in life, which is the inevitable price of fastening one's love upon other human individuals. No doubt alcohol, tobacco, and so forth are things a saint must avoid, but sainthood is also a thing that human beings must avoid."
George Orwell, "Reflections on Gandhi"