Allah and His angels call down blessings on the Prophet. You who believe! call down blessings on him and ask for complete peace and safety for him. (Surat al-Ahzab, 56)
That means they protect him, support him, show him courtesy and love. The believers should send their blessings on him with absolute submission, trust, real love and without any doubt in their hearts, because he is a very wise and valuable human being. If someone wants to give the Prophet (saas) advice with his little wisdom, that would be an abnormal behaviour. Since he acts upon revelation and you act upon your own mind.
Allah says „Follow the Prophet.“ How can you feel any resistance? How can you doubt? .“ The abjad calculation of this verse shows the year 1986. This is the period of Hazrat Mahdi (pbuh). Something must have happened in 1986, because the Qu'ran points out to help and support him. That means these are difficult years of Mahdism.