Ordinarily man is asleep. Even while you think you are awake, you are not. Walking on the road, you are fully awake - in your mind. But looked at from the vision of a Buddha, you are fast asleep, because a thousand and one dreams and thoughts are clamoring inside you. Your inner light is very clouded. It is a kind of sleep.
You are not awake. A mind full of thoughts is not awake, cannot be awake. Only a mind which has dropped thoughts and thinking, which has dispersed the clouds around it - and the sun is burning bright, and the sky is utterly empty of clouds - is the mind which has intelligence, which is awake.
Intelligence is the capacity to be in the present. The more you are in the past or are in the future, the less intelligent you are. Intelligence is the capacity to be here-now, to be in this moment and nowhere else. Then you are awake.