"Do not despair, dear heart, but come to the Lord with all your jagged wounds, black bruises, and running sores. He alone can heal, and He delights to do it. It is our Lord's office to bind up the brokenhearted, and He is gloriously at home at it." ~Charles Spurgeon
Two verses in Job 7 reminds me of David's words in this Psalm. "What is man, that thou shouldest magnify him? and that thou shouldest set thine heart upon him? And that thou shouldest visit him every morning, and try him every moment?
Relying on God is like relying on air—it's breath by breath, moment by moment. "Relying on God has to begin all over again every day as if nothing had yet been done.