Verse from 2 Corinthians

我们所顾念的，不是看得见的，而是看不见的；因为看得见的是暂时的，看不见的是永远的。(哥林多后书 4:18)

So we fix our eyes not on what is seen, but on what is unseen, since what is seen is temporary, but what is unseen is eternal. (2 Corinthians 4:18)

What do you see most clearly today? Is it what is seen or what is unseen? No matter our belief system, we ultimately have to trust what we can't see. Even the most atheistic scientist trusts gravity, breathes air, and depends upon principles she/he cannot see until they produce results in the tangible world of human perception.