Complex sentence: Though he has quite a weird personality and sometimes looks silly, he can even be called wise in some ways: he taught Molly many aspects of meditation that helped her a lot in book 2 and suggested some useful ideas about time traveling in book 3.
Split into simpler sentences: Though he has quite a weird personality and sometimes looks silly, but can be wise in some ways. He taught Molly many aspects of meditation that helped her a lot in book 2 and suggested some useful ideas about time travelling in book 3.