The proved just means it is better to be honest than anything else. We must be honest and deeds. I am going to tell you a short story to show you what this means.
One day while cutting wood a wood cutter’s axe slipped from his hands and fell into a nearby river. The wood cutter was full of grief at his loss. He sat down beside the river and lamented bitterly. Mercury, the god of water, heard the wood cutter the him. He came out of the water and asked the wood cutter told the God the cause of his grief. When the wood cutter told the God the story of his back luck. Mercury, at one dived to the bottom of the river and held the before him and axe of gold asking the man if then was his. But the wood cutter refused to take it saying that was not his axe and that was an old blunt one made of steel. The Mercury dived the second time and help before him and axe of silver, then again the poor wood cutter refused.
The God was very pleased with the honesty of the poor wood cutter and so gave him not only his lost axe but also the gold and silver.