What is truth?

If we have to arrive at some definition of truth we may look at it as a commonly agreed perception of reality. The definition has its own weaknesses :firstly ,common agreement could be in limited space, limited time and could turn into disagreement in another space,another time. Secondly we are talking about perception which even if common could be misleading and for arriving at correct perception individual and group biases will need to be recognized and eliminated .Thirdly even if we are agreed on the perception of the reality both in our time and in the past (i.e. we and our ancestors have looked at the reality as the same) we do not know what the perception will be like in future and will tally with perceptions of the present time and the past .

I wonder whether we should pursue this inquiry any further .Isn’t it fruitless? The truth keeps changing now and then and our definition will depend upon the changing context and the changing values.