8608. 'And the hands of Moses were heavy' means that the power to look upwards to the Lord was failing. This is clear from the meaning of 'the hands' as the powers of faith, dealt with above in 8604; and from the meaning of their being 'heavy' - or that the strength to raise his hands was draining away - as the fact that the power to look upwards to the Lord was failing. For 'raising one's hands' means faith that is looking upwards to the Lord, 8604, and 'letting down one's hand' means faith that is looking downwards, away from the Lord, 8606.