How Daniel in Exile Became A Man of Excellent Spirit?

How did Daniel become such that "the excellent spirit is in him" ? (Daniel 6:3, KJV)

Perhaps, quite possibly and even by necessity, he had excellent spritual parenting. I'm reading C.H. Spurgeon "Spiritual Parenting" page 71:

•     "Sound instruction in Scripture, when activated by a living faith, creates a solid character. The man who has known the holy Scriptures from childhood will be grounded and settled on the abiding principles of God's unchanging Word when he otainbs faith in Christ."