Is it hard to forgive?

have you ever heard that “forgiveness doesn't change the past but it does enlarge the future”?
some people may think that it's kinda bullshit.
my friend also ask me how come our “forgiveness can enlarge our future”
guys, sometimes it's hard to forgive someone that hurt us so bad.
but have you ever think that the people you hate maybe had been forgot that they ever hurt you?
while you think how much you hate them, how much they hurt you, how to do some revenge, or etc. they maybe snoring on their bad.
so what's your hatred for?
if you don't think about your hatred and anger, then you can use your time to think about some good things that you can do to enlarge your future.
that's why forgiveness does enlarge our future.