The first thing to consider is how your post will inspire Sarah or make her feel better. Is it the connection with the earth? Or a greater understanding of the world around her?
Even though your post is about the 4 elements, you don’t necessarily need to mention this in your headline – unless you feel this adds intrigue or it’s what Sarah is looking for (you know her better than I do!).
How to tap into the power of the 4 classical elements
=> This one is pretty good, but it feels like something is missing. What’s the benefit of tapping into the power of the 4 classical elements?
If you focus on the benefit, you get variations on your headlines #3 & #6 & #10:
How Ancient Power Helps You Understand Modern Life
How Ancient Power Helps You Be Happier in Modern Life
How Ancient Knowledge Helps You Stay Grounded (Even When Life is Hectic)
How Ancient Knowledge Gives You Clues for Personal Growth
=> I like using “ancient power” rather than the four elements as it contrasts with modern life and therefore adds intrigue. The four elements also feels a little “flat”.
Enchant readers. Woo customers. Win business.