Mindfulness & Alertness Questions

[Tom]

http://www.accesstoinsight.org/tipitaka ... .than.html" onclick="window.open(this.href);return false;:

"And what is the development of concentration that, when developed & pursued, leads to mindfulness & alertness? There is the case where feelings are known to the monk as they arise, known as they persist, known as they subside. Perceptions are known to him as they arise, known as they persist, known as they subside. Thoughts are known to him as they arise, known as they persist, known as they subside. This is the development of concentration that, when developed & pursued, leads to mindfulness & alertness.

How can feelings be known to one as they arise, known as they persist, known as they subside? How can perceptions be known to one as they arise, known as they persist, known as they subside? How can thoughts be known to one as they arise, known as they persist, known as they subside?

[Cittasanto]

by being observant, and maintaining awareness on the foundations of mindfulness

[Tom]

Is there a type of samadhi one can develop so feelings can be known to one as they arise, known as they persist, known as they subside; perceptions can be known to one as they arise, known as they persist, known as they subside; thoughts be known to one as they arise, known as they persist, known as they subside? Please provide sutta evidence

[tiltbillings]

http://www.dhammawheel.com/viewtopic.php?f=25&t=15956" onclick="window.open(this.href);return false;