Don't mind me just adding onto an old post but I'm always coming back to Eavan Boland, who was an Irish poet who wrote on mythology, identity, poetry, womanhood, and our relationship to nature among other things. Her poems and the poem "As I Walked Out One Evening" by W.H. Auden always has something new for me when I come back to it. But I'll echo what others have said too about learning every time I read poetry!