Is the body & external form, lasting or transient? Transient!
Is feeling, pleasant or not, lasting or transient? Transient!
Is experienced perceptions lasting or transient? Transient!
Is the mental constructions lasting or transient? Transient!
Is the bare aware consciousness lasting or transient? Transient!
Is the eye, ear, nose, tongue, body and mind, lasting or transient?
Is form, sound, smell, taste, touch & thought, lasting or transient?
Is solidity, fluidity, heat, motion, and space, lasting or transient?
All these are Transient!, Impermanent!, Temporary!, Fleeting!

Is what is transient, happiness or suffering? Decay is Suffering!
Is what is transient, ever changing & therefore frustrating pain
suitable to be regarded as: 'This is Mine, This I Am, This is Me'
'This I can Keep', 'This I Posses', 'This is my Self' ... ???
No certainly Not ... !!!, since what is self must be keepable, same,
constant, controllable, under one's power, and thus pleasant...
As all these phenomena are none of this, they cannot ever be self!

Seeing this, understanding this, comprehending this, the Noble
Learner is disgusted by all form, by all sensing, by all physical,
by all mental. Being thus disgusted, one experiences disillusion...
Without illusions, the mind is released & one immediately knows:
This mental liberation is final & irreversible. This - exactly this -
is the state called Nibbāna, experienced is this very life ...

Source:
The Grouped Sayings by the Buddha. Samyutta Nikāya II 244-5
http://www.pariyatti.com/book.cgi?prod_id=948507
http://www.accesstoinsight.org/canon/samyutta/index.html