Any spiritual practice is associated with temporality/mundane
if we assume that after the death of body
is not remain after us any component of our true eternal self
which can still experience the world and phenomena.
The tree bears fruit
fruits have seeds,grows out of them a new tree that is not a previous tree.
Trees do not practice anything because it does not make sense.
that is, there are two output
or we exist after death
then practice makes sense
religion and spiritual practices are a form of consolation
attempt to give life meaning.
We all die and will remain after us absolutely nothing
any consiousness, no presence, no activity,nothing.
But if you believe in reincarnation and the continued existence
then it is easier for you to die.
When we die then will not be anyone who would feel cheated.
So practice to make life easier
would have an easier life
would be happier living
after death you will not have the opportunity for anything