"Be patient at all times and in all places, for patience leads to righteousness, and righteousness leads to Paradise. Do not become angry and furious, for those two emotions lead to wickedness, and wickedness leads to the Hellfire." 

Source: Biography of Imam Sufyaan ath-Thawri by Salaahud-Deen ibn Ali ibn Abdul-Maujood

 

“The Salaf were never like this; they never used to claim leadership, or sit at the head of the gathering until they had sought this knowledge for thirty years, and you act haughty in front of those who are older than you. Get up, I never want to see you even come close to my circle.”

{Al-Bayhaqi, Al-Madkhal ila Al-Sunan Al-Kubra 2:74}

Abdullah ibn al-Mubarak - rahimahullaah - said:

"If you ever have time and find yourself in ease, then take advantage of prayer, to draw near to Allah; If you ever wish to speak ill a word of falsehood, then instead put in its place, a word of glorification; Because taking advantage of silence is better than speaking frequently, even if you are eloquent in speech."

Ibn Al-Jawzi, Rahimahullah, said:

"Whenever a new matter is firmly based on a principle in Sharee`ah, it is acceptable. However, any innovation which attempts to complete some aspect of the religion, is wrong because it implies deficiency in the religion. And, if the innovation is one which is contradictory to the Sharee`ah, it is even worse."

From: The Devil's Deception (Telbees Iblees) pg. 23