Each one swears by truth. It is man’s article of faith. Strange that some even go to prove it by blowing themselves up. It is as though truth can be proved by demolishing one’s own life.
A form exists and is designated to prove the existence of truth.
A note for example middle C on a piano is regular vibrations at the rate of 262 per second. If the wings of a humming bird could produce so many vibrations at the same rate it is middle C. No one by any stretch of imagination will on that account conclude the bird and the piano are one and the same. The bird has truth of nature, too distinct to be confused for anything else. This truth is drawn from Truth.
Only that a bird by casting itself to death despite wings given to it, need something else to show its death proves Truth. No one alive shall see its connection. I might say it is the will of the Supreme Being that I fast unto death. How shall I convince myself that thereby I have fulfilled the conditions that delineate Truth? It would be an atrocious error to assume the mind of God or Allah in denying his grace and compassion by any action that is open to doubt.
The bottom line is that we can only uphold truth in context of other beings created by God, and exercising our faculties to prove at all times. His grace is poured out from our actions and his compassion to us is balanced by showing compassion to other no matter whether is deserving or not. Anything else is born out of pride and from Satan.