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Gardening is a funny combo of "look it grows by itself" and "after rigorous planning, measuring, budgeting and digging ...in 5 years I might have pears" :)
It's very 'teach a man to fish' right - all the work at the beginning. If you plant your tree and keep it well watered for the first summer, you'll have pears every year for the rest of your life in return for half an hour's pruning per annum.
Plant pears for your heirs.