Boundaries of perception dhyana

Sri Sadgurubhyoh Namah

VBT 122 :

Vastvantare vedyamaane sarvavastushu shoonyataa,

taam eva manasaa dhyaatvaa vidito api prashaamyati

Translation :

When an object is percieved, all other objects are absent from mind. Meditate on that non-existence of other objects, even though the particular object is percieved, the mind gets tranquility.

How to do :

Select an object on which your mind can dwell longer. Concentrate on that object. This excludes knowledge of other objects in your mind. Meditate on the non-existence of other objects as far as your mind is concerned, even though the object of concentration is still percieved by mind, leads to tranquility of mind.

The theory behind this  is "What you are able to percieve is the boundary of your perception and anything that exists outside of your perception doesnt exist (as far as your mind goes)". If you are concentrating on an object, dont think that other objects that you dont percieve exist. Through that meditation on vaccuity, tranquility arises.