The deductive method is the ...

The deductive method is the mode of using knowledge, and the inductive method the mode of acquiring it.
The deductive method is the mode of using knowledge, and the inductive method the mode of acquiring it.
 Henry Mayhew

More phrases

If one does not know to which port one is sailing, no wind is favorable.
What a distressing contrast there is between the radiant intelligence of the child and the feeble mentality of the average adult.
We are masters of the unsaid words, but slaves of those we let slip out.
I have always found that mercy bears richer fruits than strict justice.
A lie gets halfway around the world before the truth has a chance to get its pants on.

Quotes from the same author

The city of London, within the walls, occupies a space of only 370 acres, and is but the hundred and fortieth part of the extent covered by the whole metropolis
 Henry Mayhew