"Clay" is a symbol of man's carnal, earthly, spiritless life, which God transforms by the power of His creative physical and spiritual Laws to achieve man's life of righteousness.
"Clay" is a figurative characteristic of man who is in the "Hand" of God under the influence of God's Laws, the Commandments "as the Work of the Hand" of God.
Negative Meaning.
"Clay" is a symbol of the frailty, frailty, fragility, unsteadiness, and changeability of man's sinful thinking and way of life.
"Clay" is also a symbol of not true, not reliable, not durable life foundations, goals, meaning of human life - its false religious dogmas, cruel political ideologies, various philosophical and other destructive teachings and their exponents.