What does it mean to doubt the wisdom of the Buddha?

Question: Doubting the Buddha's wisdom is like saying that what He teaches is false therefore, a person is not born in the Pure Land for doubting the Wisdom of the Buddha?  Not to doubt the Wisdom of the Buddha is equal to Shinjin?

Answer: Yes, not to doubt the wisdom of the Buddha means that you accept Amida Buddha knows better than you how to save you. That He devised the best method to save you, and so you follow exclusively His instructions in His Primal Vow.

To doubt the wisdom of the Buddha means that although you hear the requirements of the Primal Vow you think you know better than Amida and so instead of following the exclusive requirements of Amida – “say my Name perhaps even ten times” you think that you need to say Nembutsu many times or that you can combine Nembutsu with something else, like other practices. This means you doubt Amida’s wisdom and think you know better than Him what is needed for your salvation.

Although you hear Amida said, “entrust to me”, which means only to Him, you mix the reliance on Amida with faith in other Buddhist and nonbuddhist religious figures. Instead of wishing to be born in His Land as Amida asked you to do, you think you know better and you lie to yourself that you are already in the Pure Land of here and now. Although is clear from Amida’s own description (in the Larger Sutra) of the enlightened qualities of those born in the Pure Land, who indicate that the Pure Land is NOT here and now, you continue to believe that you know better and that the Pure Land is here and now when you clearly don’t have the same qualities.

These are just a few examples of playing smart and doubting the wisdom of the Buddha.