“Our worst days are never so bad that you are beyond the reach of God’s grace. And your best days are never so good that you are beyond the need of God’s grace” (Jerry Bridges, The Discipline of Grace: God’s Role and Our Role in the Pursuit of Holiness).

Basically, you never outgrow your need for the grace of God. You never get over your need for the gospel that saved you once and saves you still. You never grow past being completely dependent on God at every waking moment of your life.

It’s not the older I get the smarter and stronger I get, but the more I realize I don’t know and can’t do apart from the mercy of God ever present in my life.

It’s like what Aslan said to Lucy in the Narnia book Prince Caspian:

“‘Aslan” said Lucy ‘you’re bigger’.

That is because you are older, little one’ answered he.
‘Not because you are?’
‘I am not. But every year you grow, you will find me bigger’ (C. S. Lewis, Prince Caspian).

Every year I get older, God gets bigger. My need grows bigger. My hope grows bigger. My joy grows bigger. Until one day when it becomes complete.