You may deceive the entire world, but how would you ever be able to deceive your own self, your own heart? A question you may often ask, but prefer not to answer. That's the dichotomy of life. Peace prevails when this duality collapses, and that happens only within you, because it’s you who creates your own reality, your own duality. The other reflects back what we are thinking, what we are within, mirrors ourselves, our thoughts. Expand your thoughts, your horizon and there you would see/find what you always sought in your life.
As the great Bard once said...
This above all: to thine own self be true,
And it must follow, as the night the day,
Thou canst not then be false to any man.
Farewell, my blessing season this in thee!