Action Is the Criterion!

"Sayyid Hashim Haddad (ra) had studied up to the book "Suyuti" in seminary (about a year) and if - for example - we gave him an Arabic text and asked him to specify it's Irāb/اعراب (the change of vowel marking on the final letter of the word), he could not do it properly. However, he was an Arif."

Ayatullah Sayyid Mohsen Tehrani (ra)