Learning to be self sufficient is the most important thing I believe because at a time you must be ready to be able to climb up when all !!. I say "all" try to put you down. It could be that you might be wrong at some point but you can't be entirely wrong. And others simply don't understand and listen to you and just force you to be the way "they" want you to be. Which I guessed right has never been a constant demand.
The quote somewhat defies logic but try to look for a deeper meaning.