The difference between 'muse' and 'think' is the least of your worries. You haven't conjugated 'muses' correctly. If you use 'childhood' you should use 'adulthood' as well. 'Equal' is not very natural. Perhaps 'equivalent'? 'think' is also not conjugated correctly. cheledhoo??? equall is also spelled wrongly. I suggest you concentrate on getting the basics right before trying to experiment with alternate vocabulary. Because you haven't got the form of your verbs right, I don't even know what tense you are using. But to your question: 'muse' is more poetical. It suggests more wistful thinking, or thinking along the lines of 'what if I had done things differently'. You should only use a word like that if the rest of your writing is using a similar tone. Using it in a sentence with lots of spelling mistakes and grammatical errors is not sensible.

Tip: As of now, you have 24 views and no answers. You might want to consider re-writing your question. I, myself, didn't understand it.