For, when trying to do good, we use the very instability and indecisiveness we should have and exercise to avoid evil. And, indeed, I am often bewildered at seeing such great irresoluteness reign in my soul, and for so many years. I am sure, my dear friends, that, had I reflected hard enough on the evils which irresoluteness causes, I would have uprooted this evil from my soul long ago. He is like the person who wants to love two opposite things and gets neither one. As long as a man remains undecided and doubtful, he will surely never accomplish anything good.
Experience teaches that.
There is no need for me to go any further. Moreover, irresoluteness causes man to change like the moon. This indecisiveness is at one and the same time cause and effect of lukewarmness. For the lukewarm person, when called upon to give advice on a subject, will give you plenty of reasons but will not decide which are the good ones. Thus, he will never tell you where to go or what to avoid.