contemplate

(verb) look at thoughtfully; observe deep in thought. Example: "Contemplate one's navel."

(verb) consider as a possibility. Example: "I contemplated leaving school and taking a full-time job."

(verb) think intently and at length, as for spiritual purposes. Synonyms: study, meditate. Example: "He is meditating in his study."

(verb) reflect deeply on a subject. Synonyms: chew over, think over, meditate, ponder, excogitate, muse, reflect, mull, mull over, ruminate, speculate. Examples: "I mulled over the events of the afternoon." "Philosophers have speculated on the question of god for thousands of years." "The scientist must stop to observe and start to excogitate."