Pride is strengthened when we lift and carry our cares and burdens. It is flexed in the heavy lifting, but it always reaches exhaustion because God's resistance is a grace heaveir than the weight of our cares. Our heaviest cares are so precious to us that we think no one, not even God, can be fully trusted to do with them what we think is best. In this we are right. God will not do what we think is best. He will do what He knows is best. "Humble yourselves," He says.
We say, "How?"
"Cast all your cares upon Me."
"Let your heart be occupied with My care."
There is left a vacancy when cares are cast out. It will be filled with one of two occupants: more cares or the joy of His care. Let Jesus carry your cares and care for you.