Pilot posed that question to Jesus, not really expecting an answer, but to imply that there is no such thing. Truth is imaginary, and different for every mind. If any truth exists, we can never know it. So says he. But is that really the way things are? We live every day as though there exists definite, unchanging truth in the universe. Whether or not we'll admit it, we recognize that some things are intrinsically true and others false. Our actions constantly reaffirm the truth that we exist, our lives are individually valuable, and that our actions have both meaning and consequence. Our selfishness and self-seeking pursuits speak to that general truth. Even those who would preach nihilism and socialism to others never act as though their own life and comfort have no significance or meaning. If these basic truths did not exist, then it would be a waste of time to breathe or eat or go to school or save the planet. What for? To what end? If we have no greater significance, if there is nothing more than natural selection that put us here and nothing to be gained by our existence than a strain on the planet's resources... why do we bother to engage in a struggle against the inevitable? No one noticed that we evolved from nothing, and no one will shed a tear when we crash into the sun. Even if you want to believe that, you'd never live like it is true. Rather, there is truth in the universe. We do have intrinsic value and our existence here does have significance. You're already living that way, just put your belief into words.
We may never know ALL the truth with 100% certainty, without any doubt, until the end of our life here, but one can hardly wait until that moment to think about it. Do you really think that, in that moment when this life is torn away from you and what comes next is being thrust upon you, you'll have the presence of mind to make a choice about what you'll believe and trust in? If we do have significance beyond our natural existence, and if this life has meaning, too, then everyone agrees that what we believe or do or count on will impact what happens after this life is over. It's probably prudent to make up your mind now, instead of later, on what you're going to bet the farm. (mostly because you never know how long this life will last) And in spite of certain doubts and a some lack of understanding... there is still plenty of information available to make an educated decision. Don't tell yourself that you can't know the truth in order to avoid a difficult decision. Because choosing not to decide, is a choice made, too.