I do not know that the relation of my disasters will be useful to you; yet, when I reflect that you are pursuing the same course, exposing yourself to the same dangers which have rendered me what I am, I imagine that you may deduce an apt moral from my tale, one that may direct you if you succeed in your undertaking and console you in case of failure.
My father observed with pain the alteration perceptible in my disposition and habits and endeavoured by arguments deduced from the feelings of his serene conscience and guiltless life to inspire me with fortitude and awaken in me the courage to dispel the dark cloud which brooded over me.
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She trusts only what she can measure or can deduce from measurement.
Now let us consider the situation and see what may be deduced from it.
Arthur Conan Doyle -- The Adventures of Sherlock Holmes