In practice, some come to see easily, some with difficulty. But whatever the case, never mind. Difficult or easy, the Buddha said not to be heedless. Just that--don't be heedless. Why? Because life is not certain. Wherever we start to think that things are certain, uncertainty is lurking right there. Heedlessness is just holding things as certain. It is grasping at certainty where there is no certainty and looking for truth in things that are not true. Be careful! They are likely to bite you sometime in the future!
Ajahn ChahWhen we sit in meditation and hear a sound, we think, 'Oh, that sound's bothering me.' If we see it like this, we suffer. But if we investigate a little deeper, we see that the sound is simply sound. If we understand like this, then there's nothing more to it. We leave it be. The sound is just sound, why should you go and grab it? You see that actually it was you who went out and disturbed the sound.
Ajahn ChahThe Dharma Path is to keep walking forward. But the true Dharma has no going forward, no going backward, and no standing still.
Ajahn ChahThe mind of one who practises doesn't run away anywhere, it stays right there. Good, evil, happiness and unhappiness, right and wrong arise, and he knows them all. The meditator simply knows them, they don't enter his mind. That is, he has no clinging. He is simply the experiencer.
Ajahn Chah