In The Name of Allaah, The Most Merciful, The Bestower of Mercy

“Regardless what level you reach in knowledge, remember the [vast amount of knowldege] left behind by the predecessors for the successors.”

Shaikh Uthaymeen [rahimahullaah] said: This [statement] is good, but we say that what is better than that is: “Regardless what level you reach in knowledge, remember the statement of Allaah [The Mighty and Majestic]:

 وَفَوْقَ كُلِّ ذِي عِلْمٍ عَلِيمٌ

But over all those endowed with knowledge is the All-Knowing [Allaah][Surah Yusuf’ Aayah 76]

And remember the other Aayah:

وَمَا أُوتِيتُم مِّنَ الْعِلْمِ إِلَّا قَلِيلًا

And of knowledge, you [mankind] have been given only a little.
[Surah Al-Israa’ Aayah 85]

Sharh Hilyati Taalibil Ilm’ page 168.
slightly paraphrased