It is a general thinking that what we saw is truth. But what is truth? If we see a Rose of red colour ,then it is of every colour except red.But if we say that ,rose which looks like red ,is of yellow colour then it seems to be a lie.As our eyes can't see yellow in the that red rose and if we say it is of red colour then it seems to be the truth. What we think is truth is really a truth or we are living in a world were truth is nothing but an illusion.