Truth has a different meaning for different people. Each looks at it from his own prism. And each individual has a right to have his interpretation of truth. We can't judge.
But there is another way to look at truth. This is when we can judge how much a person is true to his own self. The truer the person is to his own self , the less a hypocrite he is.
"Being true to oneself" is defined as :
when your thoughts, words, and actions are in harmony with each other.
In other words, what you think - you say, what you say - you do, meaning that your thoughts, words, and actions are the same. This is the sign of a truthful person, not a hypocrite. We call it - "being true to oneself".