"Thought on" vs. "Thought about" vs. "Thought of"

Solution 1:

To "think of" something is a brief thought, a recollection of that something.

• "Seeing him jumping about like that make me think of my cat."
• "I think of you whenever I pass that restaurant."

To "think about" something means spending significant time recalling memories and details about it, possibly finding new meanings or relationships within the thoughts.

• "When you have time, think about the offer.
• "I was thinking about what happened last week, and I was wondering … ."

To "think on" something, is more archaic, but from these AV biblical examples, it seems to mean that one should keep something in mind as a background thought while thinking about something else or making a not directly related decision.

• I thought on my ways, and turned my feet … — Psalms 119
• … was minded to put her away privily. But while he thought on these things, … — Matthew 1:19–20
• While Peter thought on the vision, … — Acts 10:19