What does it mean for God to be at your "right hand"? It's more than just a location; it's a promise of unshakeable support.
The image of God being at someone's "right hand" in the ancient world signified a position of power, honor, and protection. Think of a king with his trusted advisor or a general with his most capable lieutenant standing close by.
For David, and especially as Peter applies it to Christ, God being at his right hand means divine support is readily available. It's not a distant, abstract power, but an immediate, active force ready to intervene. This assurance is the reason the Psalmist declares, "that I may not be shaken." When you know that the ultimate power and authority are not only aware of your struggles but are actively positioned to help, you gain an incredible stability. It means that even when the world shakes, your foundation in God remains firm.