One Needs to be Clever to be a Tamim

One Needs to be Clever to be a Tamim:

While one is commanded to be simple, it isn’t possible to attain the level of temimus on a high level unless one uses his brains and intellect.

It is said in the name of the Ropshitzer Rebbe zy”a: “A fundamental part of avodas Hashem is to be simple. But you need to be very smart in order to be simple.”