If you are discouraged it is a sign of pride because it shows you trust in your own power. Your self-sufficiency, your selfishness and your intellectual pride will inhibit His coming to live in your heart because God cannot fill what is already full. It is as simple as that. ~ Teresa, Mother; Kelly, Matthew. Do Something Beautiful for God: The Essential Teachings of Mother Teresa, 365 Daily Reflections (p. 86). Blue Sparrow. Kindle Edition.

Mother Teresa’s right.
When I’m counting on me and my ideas, plans I’ve made,
I often become discouraged, convinced I’m relying on a failure.
My self-sufficiency, my selfishness and my intellectual pride
always inhibit His coming to living in my heart.
God cannot fill what is already full. It is as simple as that.