Strength has a lot to do with being civilized and in control of yourself, calm and quietly powerful. In some situations, however, it might be a good thing to show your weaknesses, or your wild side, to not try to be in control or even civilized.
Have you ever been talking to someone about your mistakes and problems and you feel: "How can she understand? She's always so perfect and never makes mistakes!" or even "I bet she thinks I'm terrible. She'd never do anything so wrong!" And then, that person admits to some terrible weakness or mistake and you go, "Oh! She is like me! She does understand! I feel so much better now."
Sometimes you can connect with others only by letting them know that you aren't always strong either. If they feel you're always strong and never give into weaknesses, they'll feel that there's no connection.
Does that make sense?