I agree with the sentiment but not the tense. It should read "Judge the value of what you'll have by what you'll have to give up to get it." This is actually i

I agree with the sentiment but not the tense. It should read "Judge the value of what you'll have by what you'll have to give up to get it." This is actually in line with the example the author gives. If it's past tense, then you get yourself into sunk cost fallacies.