Ultimately, meditation is about escaping the limitations of the mind, about going beyond the mind. In fact, meditation is the only tried and proven way of doing that.

Instead of "concentration," it might be more appropriate to "focus." Concentration implies the use of the mind, and that might actually constrain us. Focus, on the other hand, can still the mind.

For instance, while meditating, simple focus on the breath, or maybe a candle. That does not take much concentration at all, since all you're doing in those exercises is being aware. The mind does not have to concentrate or think about anything, Just be aware, and still, and silent.