go deep into

See: delve
References in classic literature ?
So Roger Chillingworth -- the man of skill, the kind and friendly physician -- strove to go deep into his patient's bosom, delving among his principles, prying into his recollections, and probing everything with a cautious touch, like a treasure-seeker in a dark cavern.
They said the committee should go deep into the broader political philosophy and vision under which the PSEs will be required to play their role in the new competitive environment.
ANDY MURRAY plans to go deep into the French Open after being given an easy ride into the fourth round last night.
IT is 79 years since the one and only time the Championships was forced to go deep into a third week because of weather problems.
You could be as active as possible and the indexes can shoot into the sky or go deep into the ocean but it wouldn't bother you,' he added.
Allen's analysis of all this obliges him to go deep into the Florentine's reading of the history of religion and revelation, disclosing to view a Ficino with a remarkably sophisticated sense of history and the evolution of thought.