The doctrine of God’s immutability has a basis in the Judaeo-Christian scriptures, it is generally accepted. But, as is usually the case with most descriptions of God found in these sources, the belief that God does not and cannot change is not developed in any great detail. Given the Semitic thought patterns and linguistic expressions, which are concrete, this is not surprising. Nevertheless, there are certain passages which seem to provide a foundation for regarding God as immutable. For instance, in Mai 3:6 Yahweh says, ‘Surely I the Lord do not change.’ In Ps 101:27 the Psalmist addresses Yahweh: ‘Thou art the same and thy years have no end.’ Moreover, Yahweh’s revelation of himself as other than the world and man (Hos 11:9), Lord of all creation (Is 6:5; Ps 97:5), the almighty (Ps 135) who resembles nothing in the created world (Ex 20:4, Dt 5:8) and other similar descriptions apparently support that belief since God is unlike his creatures, who are subject to change. On the other hand, the Israelites experienced Yahweh as a living God (Jdg 8:19; 1 Kgs 17:1) who is actively and personally present to his people. Yahweh was their Lord and Master. In fact, the Old Testament is a record of that personal involvement of God with his people. The Old Testament, therefore, believed in a God who was utterly other but who despite this status listened, talked, wept, walked, judged and loved.
With the birth of Christianity this dual conception of God gains more significance.