Pensive /ˈpɛnsɪv/ ~ Engaged in, involving, or reflecting deep or serious thought.
Theosophy designates several bodies of ideas in history, but the word was revived in the nineteenth century by Helena Petrovna Blavatsky to designate her religious philosophy which holds that all religions are attempts by humanity to approach the absolute, and that each religion therefore has a portion of the truth.
Better an hour of thought than a year of regret. ~ Slovakian Proverb
There’s an agenda to colonise your mind.