Friends:
The Five Criteria for Evaluation
of Right Concentration:
After emerging from the deepest states
so far attained one reviews it thus:
1: This absorption is Happy now, and
results in future happiness too...
2: This absorption is Noble, and unrivaled by anything in this world...
3: This absorption is not reached by inferior or unworthy persons...
4: This absorption is entered upon & emerged from by me fully aware...
5: This absorption is perfectly Calm, Stilled, Unified, and neither
fabricated, suppressible, reversible nor deniable...
Source: The Exhaustive Speeches by the
Buddha. Digha Nikāya 34
http://www.pariyatti.com/book.cgi?prod_id=25103
http://www.accesstoinsight.org/canon/digha/index.html

Updated:
14 July 2009 http://What-Buddha-Said.net/drops/Samma-Samadhi.htm