"yada yada hi dharmasya
glanir bhavati bharata
tadatmanam srjamy aham" (Bhagwat Gita: Chapter Four verse 7)
"Sri Krishna said: Whenever and wherever there is a decline in virtue/religious practice, O Arjuna, and a predominant rise of irreligion—at that time I descend Myself, i.e. I manifest Myself as an embodied being."
vinasaya cha duskritam
sambhavami yuge yuge" (Bhagwat Gita: Chapter Four verse 8)
"Sri Krishna said: To deliver the pious and to annihilate the miscreants, as well as to reestablish the principles of religion, I Myself appear, millennium after millennium."
"karmany evadhikaras te
ma phalesu kadachana
ma karma-phala-hetur bhur
ma te sango ’stv akarmani" (Bhagwat Gita: Chapter Two verse 47)
"Sri Krishna said: You have a right to perform your prescribed duty, but you are not entitled to the fruits of action. Never consider yourself the cause of the results of your activities, and never be attached to not doing your duty."
"na jayate mriyate va kadacin
nayam bhutva bhavita va na bhuyah
ajo nityah sasvato ’yam purano
na hanyate hanyamane sarire" (Bhagwat Gita: Chapter Two verse 20)
"Sri Krishna said: The soul is never born nor dies at any time. Soul has not come into being, does not come into being, and will not come into being. Soul is unborn, eternal, ever-existing and primeval. Soul is not slain when the body is slain."
"vasamsi jirnani yatha vihaya
navani grhnati naro ’parani
tatha sarirani vihaya jirnany
anyani samyati navani dehi" (Bhagwat Gita: Chapter Two verse 22)
"Sri Krishna said: As a human being puts on new garments, giving up old ones, the soul similarly accepts new material bodies, giving up the old and useless ones."
"nainam chindanti shastrani
nainam dahati pavakah
na chainam kledayanty apo
na sosayati marutah" (Bhagwat Gita: Chapter Two verse 23)
"Sri Krishna said: The soul can never be cut to pieces by any weapon, nor burned by fire, nor moistened by water, nor withered by the wind."