Some races of humans are more prone to emotion than others. So something written by such a one may speak of high emotion. For example, St. Augustine, in his Confessions, after His conversion, in his retreat before baptism, describes emotional highs from reciting Psalm 4. Most people would not find that the case. The state of our health and body in general can affect our response in feeling.
Sluggish bowels can tend to dampen or hold down emotions.
Women in general are more inclined to feelings than men. Further, their completely natural hormonal cycles can bring a constantly shifting landscape, as it were, before their eyes. Sins, and even imperfections, even attachments to earthly things can predispose one to aridity. In a narrow sense, that might he a box of coins hidden under the floor for safekeeping. All these things are lower than God Himself, some much lower than others.