It is reported that Abû Al-Dardâ – Allâh be pleased with him – said:
You will never be pious (a person of taqwâ) until you become knowledgeable, and you will never be beautiful with your knowledge until you act [by it].

Ibn Ábd Al-Barr, Jâmi’ Bayân Al-‘Ilm wa Fadlihî article 1239.