Let the sin of Uzza warn all to take heed of presumption, rashness, and irreverence, in dealing with holy things; and let none think that a good design will justify a bad action. Let the punishment of Uzza teach us not to dare to trifle with God in our approaches to him; yet let us, through Christ, come boldly to the throne of grace. If the gospel be to some a savour of death unto death, as the ark was to Uzza, yet let us receive it in the love of it, and it will be to us a savour of life unto life.
SDA Bible Commentary (limited)
Volume 1-7
12. David was afraid. David was afraid because of sin in his own experience. Having witnessed the signal judgment of God upon Uzza, he feared lest some error in his own life bring divine judgments upon him as well.