Relatively for that person, yes. Absolutely, no.
Because of our physical nature, being subject to our various physical bodies, the emotional and mental constructs we've developed in our lives, I don't believe we'll ever have the capacity to physically say "this" is truth or "that" is an absolute truth. Once we say this or that is a truth then it changes, or maybe more accurately our view of it changes. We will do "greater things" as we evolve in time, but until we learn how to reflect those greater truths within us, our relatives truths will always falls short of what really is. Even the greater things we do in time will still only be relative truths compared to the absolute.
The physical Universe is an illusion, subject to a constant barrage of changes, it can never be relied on. As long as we view the Universe from a strictly physical point of view, it will deceive us and we will suffer. This last sentence was one of the Buddha's main points in His first of the Four Noble Truths, when He said, and I'm paraphrasing here, 'the mundane world will always be incapable of satisfying the disciple'. I believe the Christ echoed this same sentiment when He said: "You, are from below, I am from above: you are of this present world, I am not of this present world. That is why I told you that you will die in your sins".