We find in Exodus 12:40 that the Israelites left Egypt on the very day that marked 430 years living there. While those years began in favor, the years under kings that did not favor Joseph’s relatives lasted centuries and they were slaves.
While it seemed like forever—slavery is like that—God was attentive. When the Israelites cried out to Him, God heard, God remembered, God knew what He would do to rescue them.
God was involved, understood, felt, heard, knew and was prepared to act for deliverance. He was not surprised by their situation, not unfamiliar with their need, not unaware of the suffering, but was waiting for them to call out to Him. “I have come down to deliver and to bring them out” into a newness of life away from bondage. We can read the backstory of the deliverer He had raised up to bring them out and the ways that He gave them release from the slavery. All He wanted was for them to cry out to Him, to reach out to Him more than to complain about the suffering. There could be a lesson in that for us…