If you find some difficulty in your practice, that is the warning that you have some wrong idea, so you have to be careful. But do not give up your practice; continue it, knowing your weakness. Here there is no gaining idea. Here there is no fixed idea of attainment. You do not say, “This is enlightenment,” or “That is not right practice.” Even in wrong practice, when you realize it and continue, there is right practice. Our practice cannot be perfect, but without being discouraged by this, we should continue it. This is the secret of practice.
–Zen Mind, Beginner’s Mind by Shunryu Suzuki, page 59