what's the difference between learn by and learn from?

[Juzwannabebetter]

I kind of know when to use learn by and learn from. But when my friend asked me why, I couldn't really explain.She asked me why it has to be learn from the textbook, not learn by the textbook. may i have a detail explanation? tkz

[Milanya]

"learn by" indicates the method you used in order to learn (learn by rote, learn be experience, learn by studying)
"learn from" indicates the source of learning (Learn from a book, learn from my parents, learn from other's mistakes)
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con·text - The part of a text or statement that surrounds a particular word or passage and determines its meaning.