Alive.

Is when you leave your safe home, where everything is predictable and stable, that you get the chance to use all your capabilities, everything you learnt up until then and all your personality traits to get by. You sharpen your instinct and use your intelligence to its full potential. You go into survival mode. Your sensitivity is sky-high and the learning curve is huge. You feel utterly alive. And that's the only way life is really worth living.