Efficacy Quotes

The metaphor is perhaps one of man's most fruitful potentialities. Its efficacy verges on magic, and it seems a tool for creation which God forgot inside one of His creatures when He made him.

My proposal now is to test a vaccine first on people who have been infected, and if you show some efficacy at this level, you might be able to go further to study uninfected people in a population with a high rate of infection.

Every single instance of a friend's insincerity increases our dependence on the efficacy of money.

There is curiously little art concerning the efficacy of reason - perhaps simply because reason is not noticeably efficacious.

But the power of instruction is seldom of much efficacy, except in those happy dispositions where it is almost superfluous.

I would like to cite an instance which proves the efficacy of clean living on the part of an athlete coupled with the inspiration received from a champion which go a long way to making a champion.