one's own thoughts; personal opinion; personal view
Formal or literary term used to express one's own thinking or personal viewpoint, often in contrast to public or official positions.
In my personal opinion, this plan should be reconsidered.
He does not hesitate to express his own thoughts.
Compound of 私 (private, personal) and 考 (thought, consideration). The exact historical derivation is uncertain, but the spelling is conventionally associated with the meaning of 'one's own thoughts'.