visuddhimagga,
there are many instances how one is purified(attain nibbana), which are listed on the first chapter. Also there are differences in who attains what as an example: cessation* is not attainable for insight meditator..
pdf p66 wrote:Blessed One said:
“When a wise man, established well in virtue,
Develops consciousness and understanding,
Then as a bhikkhu ardent and sagacious
He succeeds in disentangling this tangle.”
..
But the words ardent and sagacious mean that by
persevering with energy of the kind here described and by acting in full awareness
with understanding he should, having become well established in virtue, develop
the serenity and insight that are described as concentration and understanding.
pdf p489 wrote:1. [436] Now, concentration was described under the heading of consciousness
in the stanza:
When a wise man, established well in virtue,
Develops consciousness and understanding (I.1).
And that has been developed in all its aspects by the bhikkhu who is thus
possessed of the more advanced development of concentration that has acquired
with direct-knowledge the benefits [described in Chs. XII and XIII]. But
understanding comes next and that has still to be developed.
you got to be virtue purified before concentration
pdf p139 wrote:1. [84] Now, concentration is described under the heading of “consciousness” in
the phrase “develops consciousness and understanding” (I.1). It should be
developed by one who has taken his stand on virtue that has been purified by
means of the special qualities of fewness of wishes, etc., and perfected by observance
of the ascetic practices.
*
18. Herein, (i) What is the attainment of cessation? It is the non-occurrence of
consciousness and its concomitants owing to their progressive cessation.
tranquilizing the effort(is the fruition attainment), also can find how path fruit differ from each other based on tranquilization level.
pdf p789 wrote:“How is it that understanding of the tranquilizing of
effort is knowledge of fruit? At the moment of the stream-entry path right view in
the sense of seeing emerges from wrong view, and it emerges from the defilements
and from the aggregates that occur consequent upon that [wrong view], and
externally it emerges from all signs. Right view arises because of the tranquilizing
of that effort. This is the fruit of the path” (Paþis I 71), and this should be given in
detail. Also such passages as, “The four paths and the four fruits—these states
have a measureless object” (Dhs §1408), and, “An exalted state is a condition, as
proximity condition, for a measureless state” (Paþþh II 227 (Be)), establish the
meaning here.
..
6. Herein, (i) What is fruition attainment? It is absorption in the cessation in
which the noble fruition consists.