5. δε never always means then or thus, never but, which is a rendering which will screw up any understanding of a Greek verse.
4. μεν is always about pre-cause. It is the why of the next wording or sentence.
3. αυτος means same while ουτος a such thing. εις means a specific thing being both a noun and verb just like ουτος. εκεινος means the other thing. There are more combinations of article and pronoun and greek number meaning one.
2. Masculine is the strong gender, and feminine is the weaker gender. It determines if the noun is major or minor.
1. Reflexive pronouns in the genitive are about what the object does.