I've never heard of anyone that thinks 'darkness will make us weak'
Usually it's the other way around, people turn to darkness because they want strength and power. But if you choose to live in the light, then you are able to see the treasures that you already have within.

In the dark, you can't see where you are going, you have to guess. You might find yourself in a bad place but you can assume that it's good because you are unaware of anything better. People retreat into the dark because they can't bare the pain that is in the light. Walking in the light is the harder path my friend. Forgiveness is the hardest thing to do sometimes, but it brings light to the offenders darkness.

In the light, you see everything. This does not make you transparent, this makes the world transparent for you. This makes darkness transparent.

The positivity of darkness is that it allows for rest, to turn off and relax after a hard days work. Darkness is also good for shutting out cunning or opportunist people who prey on harmlessness. You can put on a dark mask to prevent them. That is only a few things I care to type out right now. Darkness has much to teach the individual.

Everything and concept in this world has a positive potential that must be found and utilized.