Deep Investigation is to be avoided.

Moreover, if the martyrs and confessors who have been crowned had approached with double thoughts they could not have been crowned. For when our Freewill is in a strait between keeping the commandment and breaking the commandment, it is usually the case that it is seeking two reasonings destructive of one another, so that by means of the. interpretation of one reasoning it may flee from the pain of the other, that is to say, (it argues) in order that by a false excuse it may cast away the burden of the commandment. Now, without wandering after those things which are unnecessary, or omitting anything that is necessary, let us say in brief and not at length, that if anything succeeds by means of a single sound thought, its soundness is weakened by many thoughts. For if we approach with polished wiles any matter which we ought to approach in a simple way, then our intelligence becomes non-intelligence. For in the case of every duty, whenever a man proceeds beyond what is its due, all the ingenuities which he can devise about it, are foolish. So (too) in the case of any investigation in which the investigator slips from its truth, all the discoveries he may make, although his discoveries may be clever, are false. For everything which is clever is not true ; but whatever is true is clever. And whatever is debated is not deep, but whatever is said by God is subtle when it is believed. But there is no subtlety equal to [Ov. p. 33.] this, that everything should be duly done in its own way, and if it happen that what is to be done can be done simply, its simplicity is subtlety. For it is all the more fitting that we should call this simplicity subtlety in that it accomplishes helpful things without many combinations and reasonings. For in that it does things easily it resembles Deity, Who easily creates everything.