John Flavel said this quote
“ Above all the studies in the world, study your own hearts; waste not a minute more of your precious time about frivolous & unsubstantial controversies. My dear flock, I have, according to the grace given me, labored in the course of my ministry among you, to feed you with the heart strengthening bread of practical doctrine, and I do assure you, it is far better you should have the sweet and saving impressions of gospel truths, feelingly and powerfully conveyed to your hearts, than only to understand them by a bare ratiocination, or a dry syllogistical inference. Leave trifling studies to such as have time lying on their hands and know not how to employ it. Remember you are at the door of eternity, and have other work to do. Those hours you spend upon heart-work in your closets, are the golden spots of all your time and will have the sweetest influence up to your last hour. ”