A man with ideal virtue is one who follows Tao and Tao alone.
Tao has an effect in the physical realm but is unclear.
It is unclear, but with insight one can look beyond physical form and effects, to see its spiritual attributes.
Tao’s power to influence things is unclear but its effect can be seen in the physical realm.
Tao is so real, it feels like one can trust it in spirit.
Throughout the ages, from what has been told, its Name never goes away.
How do I know all of this?
From observing spiritual attributes, and the effects which Tao has made manifest in creation (visible and invisible).
Implications from the Holy Books
Blinded are your eyes! Perceived ye not the greatness of the power of God and of His sovereignty? Beheld ye not His majesty and glory? ……Hearken unto My speech, and tarry not though it be for less than a moment. Thus biddeth you He Who is the Beauty of the All-Merciful, that haply ye may detach yourselves from the things ye possess, and ascend to the heights from which ye can discover the whole creation sheltered beneath the shadow of His Revelation. —Bahá’u’lláh, Gleanings From the Writings of Bahá’u’lláh 121