to explore, to know, to realise and to practise
reading, learning, watching, playing sports/video-games, browsing the internet and sometimes chatting [SPORTS]: football, athletics, volleyball, table tennis, cricket, etc.
القرآن الكريم, history, languages, literature, linguistics, General Knowledge, Scientific, computer programming and sometimes course-related books
I keep six honest serving-men
(They taught me all I knew);
Their names are What and Why and When
And How and Where and Who. (Rudyard Kipling)