Good point. Also, the following sequence is in dozens of suttas:
E.g. http://www.accesstoinsight.org/tipitaka ... .than.html" onclick="window.open(this.href);return false;[Works through Jhanas...]
"With his mind thus concentrated, purified, and bright, unblemished, free from defects, pliant, malleable, steady, and attained to imperturbability, he directs and inclines it to
[... three knowledges ...]
Mike