I won't scatter your sorrow to the heartless sea. I will always be with you. Plant your roots in me. I won't see you end as ashes. You're all diamonds.
After witnessing a human that's new to Ponyville attack Pinkie Pie, you waste no time in coming to her aid. In the process of helping her, you discover you're more of a friend to Pinkie than you ever realized.
Never thought I'd walk another road after the Divide. Thought I'd stay, face my crimes to the Courer's Mile. Message in that; we're never truly done carving out our history.