user4830: I read somewhere (don't remember where) that the Buddha mentioned, that he has taught only a fraction of what he could discern with his eye of wisdom (about existence). Does anyone know which Sutra describes this? 

user254: That sutta (or, at least, one of those suttas) is sometimes summarized as "a handful of leaves".
Simsapa Sutta: The Simsapa Leaves

"In the same way, monks, those things that I have known with direct knowledge but have not taught are far more numerous [than what I have taught]. And why haven't I taught them? Because they are not connected with the goal, etc.


4830: <p>I read somewhere (don't remember where) that the Buddha mentioned, that he has taught only a fraction of what he could discern with his eye of wisdom (about existence). Does anyone know which Sutra describes this? </p>
 254: <p>That sutta (or, at least, one of those suttas) is sometimes summarized as "a handful of leaves".</p>

<p><a href="http://www.accesstoinsight.org/tipitaka/sn/sn56/sn56.031.than.html" rel="nofollow">Simsapa Sutta: The Simsapa Leaves</a></p>

<blockquote>
  <p>"In the same way, monks, those things that I have known with direct knowledge but have not taught are far more numerous [than what I have taught]. And why haven't I taught them? Because they are not connected with the goal, etc.</p>
</blockquote>
