Truth lies [is] at the bottom of a well. 真理難以探求
Time is the father of truth. 時間檢驗真理
Truth and roses have thorns about them. 真理和玫瑰,身上皆有刺。
另外,也可以斟酌 Oscar Wilde 的這壹句:
The pure and simple truth is rarely pure and never simple.
英語牛人團