Quote:
Col 2:3 --> "in whom are hidden all the treasures of wisdom and knowledge."

Here's a bit of logic for you:

If an object is hidden, it is not in view and cannot be used.
Jesus' treasures are hidden.
Therefore, jesus treasures are not in view and cannot be used.
Jesus' treasures are widom and knowledge.
Therefore, wisdom and knowledge are not in view and cannot be used.
That is not very strong logic. If something is hidden it cannot be revealed?

First of all you didnt bother to figure out who it was hidden from. It never said that it was hidden from everyone.

Second there is nothing to prevent it from being revealed. If something is hidden it can be at any time revealed at the discretion of the hider.

Third you have failed to evaluate the material itself, nor to take time into consideration. Knowledge can be revealed bit by bit over time. Unlimited knowledge can be revealed thusly over an unlimited time period. Therefore an unlimited body of knowledge(such as that which is within Christ) can be both hidden and revealed at the same time, because parts of it can be hidden, and parts of revealed.

If I have wisdom and knowledge hidden within me, it becomes unhidden as soon as I choose to reveal it. God reveals His knowledge to His elect. It is hidden to everyone else.