Diddy also posted photos of himself arriving to the ceremony with the "love of his life," his mom—Janice—and several quotes from his speech after he was done.

"Howard University didn't just change my life--it entered my soul, my heart, my being and my spirit," Diddy posted in one, adding, "Nobody is going to invite you to the front of the line, you got to push your way to the front of the line."

Years ago, Diddy attended Howard University as a business major but left after two years in 1990. Since he did drop out, some Howard University students were upset when he was first announced as the commencement speaker, but all appeared well during the graduation. After his uplifting speech, Diddy received a standing ovation and "Diddy" chants from the Class of 2014, according to Billboard.

"Of all the amazing moments God has blessed me with, this has to be one of The Greatest! Thanks You Howard University and The Class of 2014 #DrCombs #DiddySpeechHU," Diddy wrote after the ceremony.

Wolf Blitzer, transplant surgeon Dr. Clive Callendar, jazz composer Benny Golson and PepsiCo CEO Indra Nooyi also spoke at the 2014 Howard commencement.