The method of training detailed by the Buddha in AN 3.32...
Now the Ven. Sariputta went to visit the Blessed One...
As he sat at one side the Blessed One said this to him:
“Sariputta, you must train yourself thus
: In this body together
with its consciousness, there shall be no notion of ‘I’ and ‘mine,’
no tendency to conceit. Likewise in all external objects there
shall be no such notion or tendency. We will abide in the
attainment of the heart’s release, the release through insight, so
that we have no notion of ‘I’ and ‘mine,’ no tendency to conceit.
That is how you must train yourselves.
“Insofar as a bhikkhu has no such notions, no such tendency...
and abides in such attainment... he is called ‘A bhikkhu who
has cut off craving, broken the bond: one who, by perfect
comprehension of conceit, has made an end of dukkha.’
“Moreover, in this connection, Sariputta, I spoke thus in the
chapter on The Goal in (the sutta called) The Questions of
“The abandoning of lust and grief,
both these, and sloth’s destruction too,
restraint of mental restlessness
and pure tranquility of mind,
the equipoise of wholesome thought –
these I call
‘Release by knowledge’ and
‘The breaking up of ignorance.’”