Yes. I also agree with all three comments by Siebe, Vince, and Akvan above.
It is indeed not possible for any living being, including an Arahant, to fully comprehend the wisdom and capabilities of a Buddha. I discuss this a bit at:
Buddha Dhamma: Non-Perceivability and Self-Consistency
Even though an Arahant attains the same Nibbana as a Buddha, the capabilities of a Buddha can be matched only by another Buddha.
Siebe said: “We now tend to belief, based on craving and avijja and identifying with khandha’s, that we are ‘a human’, an “I”, a subject, a living being, a person, a man or woman, but that is only due to deeply ingrained habits.”
That is the essence of Buddha Dhamma. When one realizes that it is not fruitful (and also dangerous) to crave for things in this world, one’s various gathi will slowly dissipate. At the end, at Arahanthood, there will be no “gathi” left, except for harmless habits devoid of defilements. The dangers seen at the Anagami stage, for example, cannot even be fathomed at the Sotapanna stage (dangers of kama raga).