The master of light

In the huge art collection at the Winterpalace is also Rembrandt represented.
The painting on the picture is from Abraham. Abraham has gotten orders from god to do a sacrifice to prove his loyalty. The sacrifice is to murder his own son. Just before the act, Abraham is stopped by an angel sent out by god
This biblic story is a metafor concerning loyalty and trust.
As I understand, Rembrandt was a master of light in his paintings which I think one can clearly see on this painting.

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