Friends:
Transient whether
Internal, External, Past, Present or Future!!!
At Savatthi The Blessed Buddha said this:
Bhikkhus, any eye & any form is impermanent, whether internal,
external,
past, present or future. Seeing this any educated Noble Disciple becomes
indifferent towards any past
vision & any past form, he does not search for
delight in any future
vision nor any future form, & he cultivates disgust for
any present
vision & present form in order to make it all fade away & cease...
Any ear & any sound is impermanent; Any nose & any smell is impermanent;
Any tongue & flavour is impermanent; Any body & any touch is impermanent;
Any mind & any mental state is impermanent, whether internal, or
external,
past, present or future. Seeing this any educated Noble
Disciple becomes
indifferent towards any past mind & any past mental state, he does not
search for delight in any future mind nor any future mental state, & he do
indeed cultivate disgust for any present mind, mood, mentality & any present
mental state so to make it fade away, be all stilled, tranquilized & cease...

More on impermanence, inconstancy, & transience (Anicca)
Anicca (Impermanence) According to Theravada
(Bhikkhu Ñanamoli)
http://www.accesstoinsight.org/lib/authors/various/wheel186.html
http://What-Buddha-Said.net/library/DPPN/wtb/a/anicca.htm
http://What-Buddha-Said.net/drops/II/Transient_formations.htm
http://What-Buddha-Said.net/drops/II/Perceiving_Transience.htm
http://What-Buddha-Said.net/drops/III/Impermanence_Anicca.htm
http://What-Buddha-Said.net/drops/II/The_Internal_Transience.htm
http://What-Buddha-Said.net/drops/II/The_External_Transience.htm
http://What-Buddha-Said.net/drops/IV/Experiencing_Impermanence.htm
http://What-Buddha-Said.net/drops/IV/Contemplating_Impermanence.htm
http://What-Buddha-Said.net/drops/IV/Contemplating_Impermanence_2.htm
http://What-Buddha-Said.net/drops/IV/Experiencing_Universal_Transience.htm

Source:
The Grouped Sayings by the Buddha. Samyutta Nikāya. IV 4
The group on the 6 Senses 35:7 Transient in all
Three Times.
http://www.pariyatti.com/book.cgi?prod_id=948507
http://www.accesstoinsight.org/canon/samyutta/index.html

Updated:
22 Nov 2009
http://What-Buddha-Said.net/drops/II/At_All_Times.htm