Kensho is a wonderful milestone on your path, but it is easy to become attached to this experience. Attachment is a barrier to further progress and is a clear sign that you have stumbled past your realization.
With kensho you realize that you have been okay from the very beginning, that old age, sickness, and death have never had any real hold on you. What more could you hope to realize? Why should you continue to practice?
Learned audience, if you fail to continue with post-realization practice, you will allow your experience to stagnate and fade away. Without continued determination and cultivation, you will, at best, remain at the threshold of awakening. Not allowing yourselves to become stuck here, you should continue to move ever deeper. If you do persist in dedicated practice, enlightenment itself will eventually disappear along with its sister, delusion. Having uncovered the universal mirror prajna, you are no longer bound to simply trust in the teachings of others. You now have intimate wisdom and insight with which to work. You have gone beyond the words–“kensho,” “enlightenment,” and “true-nature”–to the reality that these terms indicate.
Good friends, if your initial insight is to be of any real and lasting value, you must learn to apply it. Although cultivation still requires you to make sustained effort, you will find that your experience has inspired you with deeper confidence and competence. With even the shallowest of kensho experiences, you will be amazed at your new ability to grasp teachings that have eluded you. By continuing to cultivate practice and enlightenment, you can deepen your realization endlessly.