On this page of our guide to Psychonauts 2 we've listed the Nuggets of Wisdom available in the PSI King's Sensorium.
There are 3 Nuggets of Wisdom in this level.
Nugget of Wisdom 1
Location The Eye Shrine.
To get to this secret, you have to stop the platforms that are spinning erratically. Then jump on them until you reach the platform with green-black suitcases, where you will find the Nugget of Wisdom.
2nd Nugget of Wisdom
Reaching this secret takes a little skill and a little luck. You need to slow down the tongue, jump on its tip and don't fall off. At the very top, bounce off to obtain the collectible.
3rd Nugget of Wisdom
This secret is very easy to obtain. All you have to do is position the reflector so that it's facing the prism. The path will lead you directly to the collectible.