Beyond all Doubt, Perplexity and Confusion!
The Blessed Buddha once said: There are 5 primary mental Abilities:
All these fine abilities culminate in the Deathless Destination,
which is their final goal, home, purpose, and resulting effect...
When having seen, known, understood, directly experienced,
fully realized and touched this through wisdom, then one is
quite beyond all doubt, uncertainty, perplexity and confusion!
The Ability to See forms is similar to the ability to Understand ideas!
More on the 5 prime mental Abilities (indriya):
Both is done by human brain neuron cells by transmitting signals!
The Grouped Sayings of the Buddha. Samyutta Nikāya. Book V 
Section 48: On The 6 Abilities. The Eastern Gatehouse: 44.
Have a nice & noble day!
Friendship is the Greatest!
Bhikkhu Samāhita _/\_ ]