With overthinking, work won't complete.
What are the suttas which states this balance?
"Then there is the case where a monk takes the Dhamma as he has heard & studied it and thinks about it, evaluates it, and examines it with his intellect. He spends the day in Dhamma-thinking. He neglects seclusion. He doesn't commit himself to internal tranquillity of awareness. This is called a monk who is keen on thinking, not one who dwells in the Dhamma.
"Then there is the case where a monk studies the Dhamma: dialogues, narratives of mixed prose and verse, explanations, verses, spontaneous exclamations, quotations, birth stories, amazing events, question & answer sessions. He doesn't spend the day in Dhamma-study. He doesn't neglect seclusion. He commits himself to internal tranquillity of awareness. This is called a monk who dwells in the Dhamma.
Over there are the roots of trees; over there, empty dwellings. Practice jhana, monk. Don't be heedless. Don't later fall into regret. This is our message to you."