Real weakness means you have to tell people you are strong. It means throwing up "walls" that say more about you than you probably even know yourself. Real weakness is trying so hard to hide your flaws because you'd rather not face them and overcome them.
Some people go through life being perfectly okay with how they treat others, regardless of the consequences. Their lies get so convoluted, they can't even keep up with themselves. It's easier to blame the people that get caught in the crossfire than admit that they are scared, that they have some growing up to do, or that they could actually be responsible for their own actions.
It's sad and it's weak, but it's true. Over six billion people on the planet and it's teeming with people just like this. Will they learn in time? Most will not. Is there anything we can do to change them? No. We must simply look inside ourselves and decide that our own integrity and our own standards will be higher, that we can be responsible for how we treat others and how we treat ourselves. If not, we will all become weak and remain that way. The numerous examples I could give are too long for this short blog entry.
"This above all, to thine own self be true."