Knock and the door will be opened to you; or maybe just dust comes out (no harm anyway).

What makes Berlin Philharmonic Orchestra stand out is the fact that while all the members are world-class soloists individually they can multiply the power by their perfect orchestration as a whole team.

15 sumo wrestlers cannot make a strong rugby team unless they learn how to do a team play. Even if they are very close friends 5 kids in a kindergarten cannot sing like Jackson 5 unless each receives good voice training.