Why did Abraham lead Isaac to believe that God would provide a different sacrifice when he planned to sacrifice Isaac?

6 Abraham took the wood of the burnt offering and laid it on Isaac his son, and he took in his hand the fire and the knife. So the two of them walked on together. 7 Isaac spoke to Abraham his father and said, “My father!” And he said, “Here I am, my son.” And he said, “Behold, the fire and the wood, but where is the lamb for the burnt offering?” 8 Abraham said, “God will [a]provide for Himself the lamb for the burnt offering, my son.” So the two of them walked on together.

Doesn't this seem rather deceptive on the part of Abraham? He knew that God told him to offer up Isaac. Why would he lead Isaac to believe that there would be a sacrifice other than him?

Genesis 22:6 - 8

AMP - ⁶ Then Abraham took the wood for the burnt offering and laid it on [the shoulders of] Isaac his son, and he took the fire (the firepot) in his own hand, and a knife; and the two of them went on together. ⁷ And Isaac said to Abraham, My father! And he said, Here I am, my son. [Isaac] said, See, here are the fire and the wood, but where is the lamb for the burnt sacrifice?

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