To believe something is to act as if it is true.
Dallas Willard
You know you can do it
So act as if you can
You know you are worthy
So act as if you are
You know you are kind
So act as if you are
To know is good
To believe is better
To act is what makes it real
and that's poetiquejustis
But someone will say, "You have faith; I have deeds." Show me your faith
without deeds, and I will show you my faith by my deeds.
James 2:18