While this is devastating for me to be reminded of on a daily basis, it's so very necessary and I find myself grateful to the God of the Universe who calls me his child that He loves me enough to bring this to my mind.
I've found that the moment I forget how selfish and discontent I am is the moment I begin to think I am something. To think that somehow I've arrived at a better place and pride begins to slip right in, poised to destroy me. I may not admit it or see it that way at first, but that's exactly the problem.
C.S. Lewis said:
I have never met the man I could despair of after discerning what lies in me apart from the grace of God.
When my pride gets the best of me, that's when I begin to judge. That's when I begin to condemn. That's when I become self-righteous.
When my discontentment gets the best of me, that's when I begin to say in my heart that God is not enough for me. That I need more that what He has given me.
When my selfishness overtakes me, that's when I begin to think I am entitled. That somehow I deserve certain things. That I am worthy.
Hebrews 13.5b says:
Be satisfied with what you have, for He Himself has said, I will never leave you or forsake you.
When I am content in Christ, the fact that I have Him is more than enough to sustain me. And I can have no pride, no selfishness, and no discontentment because I realize that apart from Him, I am nothing.
C.S. Lewis again put it this way:
Indeed, if we consider the unblushing promises of reward and the staggering nature of the rewards promised in the Gospels, it would seem that our Lord finds our desires, not too strong, but too weak. We are half-hearted creatures, fooling around with drink and sex and ambition when infinite joy is offered us, like an ignorant child who wants to go on making mud pies in a slum because he cannot imagine what is meant by the offer of a holiday at the sea. We are far too easily pleased.