Scientists believe that one of the most crucial developments in the evolution of humans was bipedalism – walking on two legs. That left our hands free to carry things, use tools, fight, work and touch each other. Having hands made intelligence important, leading to larger brains and, at some point, true humanity through spiritual existence.
We’ve been using our hands the same way ever since; they are the primary way we can put our thoughts and intentions into action. That was true in centuries past, as farmers, warriors, craftsmen and artists were all dependent on their hands. And while it might be slightly less true thanks to technology today, we still use primarily our hands to interface with machines through instruments and keyboards.
It makes sense, then, that hands in the Bible represent power, the force with which things are put into action. To be specific, they represent the power of spiritual good – which is the love of others and serving others – expressed through spiritual truth – which is an understanding and knowledge of what it is to love and serve others. This is in contrast to the feet, which represent power on the natural level, and a “rod,” which represents the power of the hand passed down into external or natural ideas.
In a few cases in the Bible, hands also represent communication and a drawing together. This is true when people lift their hands to heaven or to Jehovah, and also when the Lord touches children or touches people to heal them.
6947. 'What is that in your hand? And he said, A rod' means the power of the Lord's Divine Human. This is clear from the meaning of 'hand' as power, dealt with in 878, 3387, 4931-4937, 5327, 5328, 5544; and from the meaning of 'a rod' too as power, dealt with in 4013, 4876, 4936. The reason why it is the power of the Lord's Divine Human is that 'Moses' represents the Lord in respect of the law of God, which is the Word, and this is Divine Truth emanating from the Lord's Divine Human, 6752. The power meant by 'hand' is the power emanating from the Lord's Divine Rational, whereas the power meant by 'the rod' is the power emanating from the Lord's Divine Natural. The reason why 'a rod' is the power emanating from the Lord's Divine Natural is that a rod is like a foot in that it supports the body, and by 'the foot' is meant the natural, 2161, 3147, 3761, 3986, 4280, 4938-4952; and 'lifting up the hand' is power in the spiritual, while 'lifting up the foot' is power in the natural, see 5727, 5328. And since 'hand' and 'rod' have these meanings, then depending on how high the things described in the internal sense rise Moses was sometimes told, when he was to work miracles, to lift up his hand, at other times his rod.