what's faith in life ?

i really don't know, the term .
"what's faith in life" ,
how to put faith in life
after experiencing various turbulence in life .
I shouldn't be so nice to everyone before,
they're taking my kindness into advantages .

i never knew, i would start my holiday with such sorrow,
i felt numb the whole day, exhausted not from the energy
i put into school's cross country.
but exhausted cause of the unbelievable thing that i achieve today.
not a good thing. a bad thing.
in return, i realize my egoistic had betrayed me, change me totally .
what is past, is the past . only the current and the future holds where you are.
sigh.