For when I am discontent, disappointed, and impatient, may this be brought to mind...
Seek first the kingdom of God and his righteousness, and all these things will be added to you. (Matt 6:33)
Contentment comes from seeking first His righteousness.
Joy comes from seeking first His righteousness.
Patience comes from seeking first His righteousness.
All the things I need in this life come from a right relationship with God. If He is my goal, my reward, my purpose, all the details will take their proper place without my worry or fear.
I will always have what I need. That is a promise.
Believing that promise is my choice. I will never believe it unless I am seeking Him first. My needs are met in Him alone and I come to believe that by intimate fellowship with Christ.
So as long as I am putting Him aside, it's a promise that I will be discontent, disappointed, and impatient.
And when I'm sick of myself not believing His promise, I'll run to Him. He'll forgive me again. And He'll remind me that I'm seeking all other pointless things when I only have to seek one thing: His righteousness.
And I'll believe again that what I have is what I need. Nothing more. Nothing less.