For we must indeed have someone according to whom we may regulate our characters; you can never straighten that which is crooked unless you use a ruler.

I don’t recall which of Seneca’s letters this comes from but it reminds me of the core message in letter II, On Discursiveness In Reading where he tells Lucilius to focus on one author at a time. His main point is that jumping from thinker to thinker does little to settle or focus the self. It also reminds me of the famous Thoreau quote: “As a single footstep will not make a path on the earth, so a single thought will not make a pathway in the mind. To make a deep physical path, we walk again and again. To make a deep mental path, we must think over and over the kind of thoughts we wish to dominate our lives.” You need to find a thinker that you aspire to be like and follow their lead. Eventually, you will become more like this person.