Shantideva

7th Century Indian Buddhist Scholar

Affirmation / Approval
Praise all who speak the truth,
And say, "Your words are excellent."
And when you notice others acting well,
Encourage them in terms of warm approval.
Extol them even in their absence;
When they're praised by others, do the same.
But when the qualities they praise are yours,
Appreciate their skill in knowing qualities.
The Way of the Boddhisattva , Padmakara, tr.

Appearance / Form
Forms and so forth, which we sense directly,
Exist by general acclaim, though logic disallows them.
They're false, deceiving, like polluted substances
Regarded in the common view as clean.
Ibid.