In Luther's early theology of the cross, God hides His saving presence in the torment He visits on His elect; in the mature theology, the gracious hiddenness of God is primarily a matter of His lowliness, His kenosis in the incarnate Son, in His chosen signs, and in His saints. (firstthings.com)
God is, as Job found, irascible in freedom and pathos - filled in sovereignty, one who traffics in hiddenness and violence. (religion-online.org)