A man said to the Prophet (peace be upon him): By Allah, O Messenger of Allah, I do love you. The Prophet (peace be upon him) said: Look, what you are saying? The man said: By Allah, I love you, and repeated this sentence thrice. The Prophet (peace be upon him) said: If you really love me, then be prepared for acute poverty, for extreme hardship rushes more rapidly towards a person who loves me, than a flood flows towards its goal. "

(Narrated Abdullah ibn Mughaffal - al-Tirmidhi) [src: alim.org]

 "Truly, Allah does not remove Sacred Knowledge by taking it out of servants, but rather by taking back the souls of Islamic scholars [in death], until, when He has not left a single scholar, the people take the ignorant as leaders, who are asked for and who give Islamic legal opinion without knowledge, misguided and misguiding"

(Sahih Bukhari - Fath al-Bari, 1.194, hadith 100) [src: suhba.org]