I'm reading a daily devotional book "My All in All" by Robert Morgan. I love his writing style. The book focuses on Scripture containing the word "all" and there are lots of them. Morgan notes that often that word "all" could have been left out, and the verse would have made sense. But God included it. Why? Just read some of these verses as written, and then read them again omitting the word "all" --- I think you'll understand why God is an "all" kind of God.
"All things work together for the good of those who love God" Rom 8:28
"You have thrown all my sins behind Your back" Is 38:17
"Even the hairs of your head have all been counted" Matt 10:30
"Love the Lord your God with all your heart" Matt 22:37
"Trust in the Lord with all your heart" Prov 3:5-6
"Come to Me, all you who are weary and burdened, and I will give you rest"
"Goodness and mercy will follow me all the days of my life" Ps 23:6
God is the Lord of ALL, our ALL-in-ALL, our ALmighty God, our ALL-Sufficient Savior from whom ALL blessings flow. He is ALL we need.