There are boundaries to which one's mind should stay within.  And there is more than enough within those boundaries to continue to learn and grow in.  Father sets the boundaries.  Father is our Way, our Truth, and our Life.  Christ mirrors Father.  It is easy to be led astray thinking and pondering things that are outside of Father's Truth.  It is easy to lose one's mind thinking and pondering about madness, because in that, they might absorb what madness emanates.  We have plenty to consider that Father has provided to consider.  Things that Father thinks on are Father's.  One's desire to explore or learn should also be placed in Father's hands.  As it is written:

Proverbs 19:22 -- A man's desire should be loyalty to the covenant; better to be a poor man than a perjurer.

Dictionary.com -- perjurer:

Origin:
1475–85; < L perjūrāre to swear falsely, equiv. to per- through, i.e., beyond the limits (see per- ) + jūrāre to swear, lit., to be at law, deriv. of jūs  jus

"Beyond the limits"  It is very important to understand the words used in scripture.  It is better to be poor, than to go beyond the limits.  It is better to stay on the planet that Father has provided, as we do not belong up in space and is Father's territory.  We do not belong on the moon.  Limits are set, and may grow, but limits are there for good reasons.

Therefore, anything that is of the covenant should be in one's desire, where one explores.  If one's loyalties go outside of that, their loyalties are shown to change.  A change in loyalty away from Father is evil.

Loyalty:

1.     the state or quality of being loyal; faithfulness to commitments or obligations.
2.     faithful adherence to a sovereign, government, leader, cause, etc.
3.     an example or instance of faithfulness, adherence, or the like: a man with fierce loyalties.