He was able to put his conscious thought into action.

The duologue between the two characters was intense and thought-provoking.

She was lost in thought and didn't notice the time passing.

Free thought is essential for intellectual growth.

I don't expect him to understand my innermost thoughts but I wonder what I can do to get him to hold an interest.

Just as I thought, she didn't show up.

She thoughtfully prepared a surprise birthday party for her best friend.

Her thoughtlessness caused a lot of problems.

He made a thoughtless comment that hurt her feelings.